diff --git a/apps/authentication/Dockerfile b/apps/authentication/Dockerfile
index 1439b4b..0b97a04 100644
--- a/apps/authentication/Dockerfile
+++ b/apps/authentication/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-slim-bullseye
+FROM python:3.12-slim
 
 # docker settings
 ARG CONTAINER_APP_ROOT="/app"
diff --git a/apps/central_storage/Dockerfile b/apps/central_storage/Dockerfile
index fbf07c1..f8f2596 100644
--- a/apps/central_storage/Dockerfile
+++ b/apps/central_storage/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-slim-buster
+FROM python:3.12-slim
 
 # docker settings
 ARG CONTAINER_APP_ROOT="/app"
diff --git a/apps/central_storage/backend/application/document_hub.py b/apps/central_storage/backend/application/document_hub.py
index d50ac39..c2e746e 100644
--- a/apps/central_storage/backend/application/document_hub.py
+++ b/apps/central_storage/backend/application/document_hub.py
@@ -1,6 +1,7 @@
 from backend.business.document_manager import (
     DocumentManager,
 )
+from common.log.module_logger import ModuleLogger
 
 
 class DocumentHub:
@@ -8,15 +9,22 @@ class DocumentHub:
         self,
     ):
         self.document_manager = DocumentManager()
+        self.module_logger = ModuleLogger(sender_id="DocumentHub")
         return
 
     async def retrieve_document_info(self, document_id: str):
-        return await self.document_manager.retrieve_document_info(document_id)
+        await self.module_logger.log_info(f"Retrieving document info for ID: {document_id}")
+        result = await self.document_manager.retrieve_document_info(document_id)
+        await self.module_logger.log_info(f"Document info retrieved successfully for ID: {document_id}")
+        return result
 
     async def read_document_file_as_http_media_data(self, document_id: str):
-        return await self.document_manager.read_document_file_as_http_media_data(
+        await self.module_logger.log_info(f"Reading document as HTTP media for ID: {document_id}")
+        result = await self.document_manager.read_document_file_as_http_media_data(
             document_id
         )
+        await self.module_logger.log_info(f"Document media data read successfully for ID: {document_id}")
+        return result
 
     async def upload_document(
         self, associated_with: str, file_name: str, file_data: bytes
@@ -26,11 +34,16 @@ class DocumentHub:
             file_name: the name of the file
             file (bytes): the file to be uploaded
         """
-        return await self.document_manager.upload_file(
+        await self.module_logger.log_info(f"Uploading document {file_name} for user {associated_with}")
+        result = await self.document_manager.upload_file(
             associated_with, file_name, file_data
         )
+        await self.module_logger.log_info(f"Document upload completed for {file_name}, result: {result}")
+        return result
 
     async def delete_documents(self, document_ids: list):
+        await self.module_logger.log_info(f"Deleting documents: {document_ids}")
         for document_id in document_ids:
             await self.document_manager.delete_document(document_id)
+        await self.module_logger.log_info(f"Documents deleted successfully: {document_ids}")
         return
diff --git a/apps/central_storage/backend/business/document_manager.py b/apps/central_storage/backend/business/document_manager.py
index 08b212e..7e46819 100644
--- a/apps/central_storage/backend/business/document_manager.py
+++ b/apps/central_storage/backend/business/document_manager.py
@@ -1,10 +1,12 @@
 from backend.services.document_service import DocumentService
 from backend.models.models import MediaType, DataFormat
+from common.log.module_logger import ModuleLogger
 
 
 class DocumentManager:
     def __init__(self) -> None:
         self.document_service = DocumentService()
+        self.module_logger = ModuleLogger(sender_id="DocumentManager")
 
     async def retrieve_document_info(self, document_id: str):
         await self.document_service.load_document(document_id=document_id)
diff --git a/apps/central_storage/webapi/bootstrap/application.py b/apps/central_storage/webapi/bootstrap/application.py
index aae7a72..575d41d 100644
--- a/apps/central_storage/webapi/bootstrap/application.py
+++ b/apps/central_storage/webapi/bootstrap/application.py
@@ -12,6 +12,7 @@ from webapi.providers import probes
 from webapi.providers import metrics
 from .freeleaps_app import FreeleapsApp
 from common.config.app_settings import app_settings
+from common.log.module_logger import ModuleLogger
 
 
 def create_app() -> FastAPI:
@@ -20,6 +21,10 @@ def create_app() -> FastAPI:
     app = FreeleapsApp()
 
     register_logger()
+    
+    # Create application logger for startup logging
+    app_logger = ModuleLogger(sender_id="ApplicationBootstrap")
+    
     register(app, exception_handler)
     register(app, database)
     register(app, router)
@@ -37,6 +42,14 @@ def create_app() -> FastAPI:
     if app_settings.METRICS_ENABLED:
         register(app, metrics)
 
+    # Log application startup completion
+    import asyncio
+    async def log_startup():
+        await app_logger.log_info("Central Storage application initialized successfully")
+    
+    # Run the async logging
+    asyncio.create_task(log_startup())
+
     return app
 
 
diff --git a/apps/content/Dockerfile b/apps/content/Dockerfile
index bfad1fd..efc13d4 100644
--- a/apps/content/Dockerfile
+++ b/apps/content/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-slim-buster
+FROM python:3.12-slim
 
 # docker settings
 ARG CONTAINER_APP_ROOT="/app"
diff --git a/apps/content/backend/content/content_service.py b/apps/content/backend/content/content_service.py
index b7c16ac..2179958 100644
--- a/apps/content/backend/content/content_service.py
+++ b/apps/content/backend/content/content_service.py
@@ -6,15 +6,18 @@ from common.constants.region import UserRegion
 from backend.document.document_manager import DocumentManager
 from .content_sharepoint_manager import ContentSharePointManager
 from backend.content.constants import ContentSource
+from common.log.module_logger import ModuleLogger
 
 
 class ContentService:
     def __init__(self) -> None:
-        pass
+        self.module_logger = ModuleLogger(sender_id="ContentService")
 
     async def retrieve_content_directories_for_folder(
         self, folder_name: str, region: UserRegion
     ) -> List[ContentDirectory]:
+        await self.module_logger.log_info(f"Retrieving content directories for folder: {folder_name}, region: {region.name}")
+        
         folder = (
             await ContentFolderDoc.find(
                 ContentFolderDoc.folder_name == folder_name,
@@ -26,12 +29,18 @@ class ContentService:
         if folder is None or folder.valid_thru.replace(
             tzinfo=timezone.utc
         ) < datetime.now(timezone.utc):
+            await self.module_logger.log_info(f"Folder cache expired or not found, fetching from SharePoint: {folder_name}")
             folder = await ContentSharePointManager().retrieve_directories_for_folder(
                 folder_name=folder_name, region=region
             )
 
-        return folder.content_directories if folder else None
+        result = folder.content_directories if folder else None
+        await self.module_logger.log_info(f"Successfully retrieved {len(result) if result else 0} content directories for folder: {folder_name}")
+        return result
 
     async def retrieve_content_as_media_data(self, document_id: str) -> Optional[str]:
+        await self.module_logger.log_info(f"Retrieving content as media data for document ID: {document_id}")
         document_manager = DocumentManager()
-        return await document_manager.retrieve_document_as_http_media(document_id)
+        result = await document_manager.retrieve_document_as_http_media(document_id)
+        await self.module_logger.log_info(f"Successfully retrieved media data for document ID: {document_id}")
+        return result
diff --git a/apps/content/webapi/bootstrap/application.py b/apps/content/webapi/bootstrap/application.py
index 038f61b..4c076d1 100644
--- a/apps/content/webapi/bootstrap/application.py
+++ b/apps/content/webapi/bootstrap/application.py
@@ -13,6 +13,7 @@ from webapi.providers import probes
 from webapi.providers import metrics
 from .freeleaps_app import FreeleapsApp
 from common.config.app_settings import app_settings
+from common.log.module_logger import ModuleLogger
 
 
 def create_app() -> FastAPI:
@@ -21,6 +22,10 @@ def create_app() -> FastAPI:
     app = FreeleapsApp()
 
     register_logger()
+    
+    # Create application logger for startup logging
+    app_logger = ModuleLogger(sender_id="ApplicationBootstrap")
+    
     register(app, exception_handler)
     register(app, database)
     register(app, router)
@@ -37,6 +42,15 @@ def create_app() -> FastAPI:
     # Register metrics APIs if enabled
     if app_settings.METRICS_ENABLED:
         register(app, metrics)
+    
+    # Log application startup completion
+    import asyncio
+    async def log_startup():
+        await app_logger.log_info("Content application initialized successfully")
+    
+    # Run the async logging
+    asyncio.create_task(log_startup())
+    
     return app
 
 
diff --git a/apps/devops/Dockerfile b/apps/devops/Dockerfile
index 1d96106..6b07b97 100644
--- a/apps/devops/Dockerfile
+++ b/apps/devops/Dockerfile
@@ -15,7 +15,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY . .
 
 # Set environment variables
-ENV LOG_BASE_PATH=/app/log/devsvc
+ENV LOG_BASE_PATH=/app/log/devops
 
 # Create necessary directories
 RUN mkdir -p /app/log/devops
diff --git a/apps/devops/app/bootstrap/application.py b/apps/devops/app/bootstrap/application.py
index 3cf635b..0528ed0 100644
--- a/apps/devops/app/bootstrap/application.py
+++ b/apps/devops/app/bootstrap/application.py
@@ -11,6 +11,7 @@ from app.providers import probes
 from app.providers import exception_handler
 from app.providers import message_queue
 from app.common.config.app_settings import app_settings
+from app.common.log.module_logger import ModuleLogger
 
 def create_app() -> FastAPI:
     logging.info("App initializing")
@@ -33,6 +34,16 @@ def create_app() -> FastAPI:
     # Register metrics APIs if enabled
     if app_settings.METRICS_ENABLED:
         register(app, metrics)
+    
+    # Add startup logging
+    @app.on_event("startup")
+    async def startup_logging():
+        module_logger = ModuleLogger(sender_id="ApplicationBootstrap")
+        await module_logger.log_info(
+            text=f"DevOps service started successfully in {app_settings.APP_ENV} environment",
+            data={"app_name": app_settings.APP_NAME, "environment": app_settings.APP_ENV}
+        )
+    
     return app
 
 
diff --git a/apps/devops/app/common/config/app_settings.py b/apps/devops/app/common/config/app_settings.py
index d7b3c7d..8717b20 100644
--- a/apps/devops/app/common/config/app_settings.py
+++ b/apps/devops/app/common/config/app_settings.py
@@ -2,7 +2,7 @@ from pydantic_settings import BaseSettings
 
 # NOTE: The values fall backs to your environment variables when not set here
 class AppSettings(BaseSettings):
-    NAME: str = "YOUR_APP_NAME"
+    NAME: str = "devops"
     APP_NAME: str = NAME
     APP_ENV: str = "alpha"
 
@@ -17,8 +17,8 @@ class AppSettings(BaseSettings):
     APP_MONGODB_NAME: str = "testdb"
 
     LOG_BASE_PATH: str = "./log"
-    BACKEND_LOG_FILE_NAME: str = APP_NAME
-    APPLICATION_ACTIVITY_LOG: str = APP_NAME + "-application-activity"\
+    BACKEND_LOG_FILE_NAME: str = "devops"
+    APPLICATION_ACTIVITY_LOG: str = "devops-application-activity"\
     
     RABBITMQ_HOST: str = "localhost"
     RABBITMQ_PORT: int = 5672
diff --git a/apps/notification/Dockerfile b/apps/notification/Dockerfile
index dce32fc..810fa6d 100644
--- a/apps/notification/Dockerfile
+++ b/apps/notification/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-slim-buster
+FROM python:3.12-slim
 
 # docker settings
 ARG CONTAINER_APP_ROOT=/app
diff --git a/apps/notification/webapi/bootstrap/application.py b/apps/notification/webapi/bootstrap/application.py
index 65adca9..130ff17 100644
--- a/apps/notification/webapi/bootstrap/application.py
+++ b/apps/notification/webapi/bootstrap/application.py
@@ -14,6 +14,7 @@ from webapi.providers import metrics
 from webapi.providers import middleware
 from .freeleaps_app import FreeleapsApp
 from common.config.app_settings import app_settings
+from common.log.module_logger import ModuleLogger
 
 from prometheus_fastapi_instrumentator import Instrumentator
 
diff --git a/apps/notification/webapi/bootstrap/freeleaps_app.py b/apps/notification/webapi/bootstrap/freeleaps_app.py
index dca6d6e..bc6b03b 100644
--- a/apps/notification/webapi/bootstrap/freeleaps_app.py
+++ b/apps/notification/webapi/bootstrap/freeleaps_app.py
@@ -21,8 +21,14 @@ class FreeleapsApp(FastAPI):
         @self.on_event("startup")
         async def start_consumers():
             print("starting up!")
+            
+            # Consumer registration first
             await self.sms_handler.register_consumer()
             await self.email_handler.register_consumer()
+            
+            # Note: If we want startup logging for audit purposes,
+            # it should be done AFTER all critical startup is complete
+            # and database is ready. Currently keeping minimal startup.
 
         @self.on_event("shutdown")
         async def stop_consumers():
diff --git a/apps/notification/webapi/middleware/__init__.py b/apps/notification/webapi/middleware/__init__.py
index e607c44..d1b6f8b 100644
--- a/apps/notification/webapi/middleware/__init__.py
+++ b/apps/notification/webapi/middleware/__init__.py
@@ -1,4 +1,4 @@
 from .freeleaps_auth_middleware import FreeleapsAuthMiddleware
-from .tenant_DBConnection_middleware import TenantDBConnectionMiddleware
+from .database_middleware import DatabaseMiddleware
 
-__all__ = ['FreeleapsAuthMiddleware', 'TenantDBConnectionMiddleware']
\ No newline at end of file
+__all__ = ['FreeleapsAuthMiddleware', 'DatabaseMiddleware']
\ No newline at end of file
diff --git a/apps/notification/webapi/middleware/tenant_DBConnection_middleware.py b/apps/notification/webapi/middleware/database_middleware.py
similarity index 96%
rename from apps/notification/webapi/middleware/tenant_DBConnection_middleware.py
rename to apps/notification/webapi/middleware/database_middleware.py
index d568cd9..e9f12db 100644
--- a/apps/notification/webapi/middleware/tenant_DBConnection_middleware.py
+++ b/apps/notification/webapi/middleware/database_middleware.py
@@ -4,10 +4,10 @@ from webapi.middleware.freeleaps_auth_middleware import request_context_var
 from common.log.module_logger import ModuleLogger
 
 
-class TenantDBConnectionMiddleware:
+class DatabaseMiddleware:
     def __init__(self, app):
         self.app = app
-        self.module_logger = ModuleLogger(sender_id=TenantDBConnectionMiddleware)
+        self.module_logger = ModuleLogger(sender_id=DatabaseMiddleware)
 
     async def __call__(self, scope, receive, send):
         if scope["type"] != "http":
diff --git a/apps/notification/webapi/providers/database.py b/apps/notification/webapi/providers/database.py
index 7f6fc01..1dc1843 100644
--- a/apps/notification/webapi/providers/database.py
+++ b/apps/notification/webapi/providers/database.py
@@ -32,15 +32,16 @@ tenant_document_models = [
 
 class TenantDBCache:
     """
-    Enhanced tenant database cache that includes Beanie initialization.
-    product_id -> (AsyncIOMotorClient, AsyncIOMotorDatabase, beanie_initialized: bool)
-    Uses main_db.tenant_doc to resolve mongodb_uri; caches clients/dbs with LRU and Beanie state.
+    Enhanced tenant database cache that caches only clients, not databases.
+    product_id -> AsyncIOMotorClient
+    Uses main_db.tenant_doc to resolve mongodb_uri; caches clients with LRU.
+    Database instances are created fresh each time from cached clients.
     """
     
     def __init__(self, main_db: AsyncIOMotorDatabase, max_size: int = 64):
         self.main_db = main_db
         self.max_size = max_size
-        self._cache: "OrderedDict[str, tuple[AsyncIOMotorClient, AsyncIOMotorDatabase, bool]]" = OrderedDict()
+        self._cache: "OrderedDict[str, AsyncIOMotorClient]" = OrderedDict()
         self._locks: dict[str, asyncio.Lock] = {}
         self._global_lock = asyncio.Lock()
         self.module_logger = ModuleLogger(sender_id="TenantDBCache")
@@ -48,43 +49,43 @@ class TenantDBCache:
     async def get_initialized_db(self, product_id: str) -> AsyncIOMotorDatabase:
         """Get tenant database with Beanie already initialized"""
         
-        # fast-path
-        cached = self._cache.get(product_id)
-        if cached:
-            client, db, beanie_initialized = cached
-            await self.module_logger.log_info(f"Found cached database for {product_id}, beanie_initialized: {beanie_initialized}")
+        # fast-path: check if client is cached
+        cached_client = self._cache.get(product_id)
+        if cached_client:
+            await self.module_logger.log_info(f"Found cached client for {product_id}")
             self._cache.move_to_end(product_id)
             
-            if beanie_initialized:
+            # Get fresh database instance from cached client
+            db = cached_client.get_default_database()
+            if db is not None:
+                # Initialize Beanie for this fresh database instance
+                await init_beanie(database=db, document_models=tenant_document_models)
+                await self.module_logger.log_info(f"Beanie initialization completed for {product_id} using cached client")
                 return db
             else:
-                # Initialize Beanie if not done yet
-                await init_beanie(database=db, document_models=tenant_document_models)
-                await self.module_logger.log_info(f"Beanie initialization completed for {product_id}")
-                
-                # Update cache with beanie_initialized = True
-                self._cache[product_id] = (client, db, True)
-                return db
+                await self.module_logger.log_error(f"No default database found for cached client {product_id}")
+                # Remove invalid cached client
+                del self._cache[product_id]
 
         # double-checked under per-tenant lock
         lock = self._locks.setdefault(product_id, asyncio.Lock())
         async with lock:
-            cached = self._cache.get(product_id)
-            if cached:
-                client, db, beanie_initialized = cached
-                await self.module_logger.log_info(f"Double-check found cached database for {product_id}, beanie_initialized: {beanie_initialized}")
+            cached_client = self._cache.get(product_id)
+            if cached_client:
+                await self.module_logger.log_info(f"Double-check found cached client for {product_id}")
                 self._cache.move_to_end(product_id)
                 
-                if beanie_initialized:
+                # Get fresh database instance from cached client
+                db = cached_client.get_default_database()
+                if db is not None:
+                    # Initialize Beanie for this fresh database instance
+                    await init_beanie(database=db, document_models=tenant_document_models)
+                    await self.module_logger.log_info(f"Beanie initialization completed for {product_id} using cached client (double-check)")
                     return db
                 else:
-                    # Initialize Beanie if not done yet
-                    await init_beanie(database=db, document_models=tenant_document_models)
-                    await self.module_logger.log_info(f"Beanie initialization completed for {product_id} (double-check)")
-                    
-                    # Update cache with beanie_initialized = True
-                    self._cache[product_id] = (client, db, True)
-                    return db
+                    await self.module_logger.log_error(f"No default database found for cached client {product_id}")
+                    # Remove invalid cached client
+                    del self._cache[product_id]
 
             # Create new tenant connection - use raw MongoDB query since we don't have TenantDoc model
             """
@@ -127,13 +128,14 @@ class TenantDBCache:
                     detail=f"No default database found for tenant {product_id}",
                     headers={"X-Error-Message": f"No default database found for tenant {product_id}"}
                 )
+            
             # Initialize Beanie for this tenant database
             await init_beanie(database=db, document_models=tenant_document_models)
             await self.module_logger.log_info(f"Beanie initialization completed for new tenant database {product_id}")
 
-            # LRU put with beanie_initialized = True
-            await self._lru_put(product_id, (client, db, True))
-            await self.module_logger.log_info(f"Tenant database {product_id} cached successfully with Beanie initialized")
+            # Cache only the client
+            await self._lru_put(product_id, client)
+            await self.module_logger.log_info(f"Tenant client {product_id} cached successfully")
             return db
 
     async def get_main_db_initialized(self) -> AsyncIOMotorDatabase:
@@ -143,12 +145,12 @@ class TenantDBCache:
         await self.module_logger.log_info("Beanie initialization completed for main database")
         return self.main_db
 
-    async def _lru_put(self, key: str, value: tuple[AsyncIOMotorClient, AsyncIOMotorDatabase, bool]):
+    async def _lru_put(self, key: str, client: AsyncIOMotorClient):
         async with self._global_lock:
-            self._cache[key] = value
+            self._cache[key] = client
             self._cache.move_to_end(key)
             if len(self._cache) > self.max_size:
-                old_key, (old_client, _, _) = self._cache.popitem(last=False)
+                old_key, old_client = self._cache.popitem(last=False)
                 await self.module_logger.log_info(f"Cache full, removing LRU tenant: {old_key}")
                 try:
                     old_client.close()
@@ -159,7 +161,7 @@ class TenantDBCache:
 
     async def aclose(self):
         async with self._global_lock:
-            for key, (client, _, _) in self._cache.items():
+            for key, client in self._cache.items():
                 try:
                     client.close()
                     await self.module_logger.log_info(f"Closed connection for tenant: {key}")
diff --git a/apps/notification/webapi/providers/middleware.py b/apps/notification/webapi/providers/middleware.py
index ee47f3e..f11c216 100644
--- a/apps/notification/webapi/providers/middleware.py
+++ b/apps/notification/webapi/providers/middleware.py
@@ -1,5 +1,5 @@
 from webapi.middleware.freeleaps_auth_middleware import FreeleapsAuthMiddleware
-from webapi.middleware.tenant_DBConnection_middleware import TenantDBConnectionMiddleware
+from webapi.middleware.database_middleware import DatabaseMiddleware
 
 
 def register(app):
@@ -7,5 +7,5 @@ def register(app):
     Register middleware to FastAPI application
     """
     # Register middlewares
-    app.add_middleware(TenantDBConnectionMiddleware)
+    app.add_middleware(DatabaseMiddleware)
     app.add_middleware(FreeleapsAuthMiddleware)
\ No newline at end of file
diff --git a/apps/payment/Dockerfile b/apps/payment/Dockerfile
index f5ac56d..d5e55d5 100644
--- a/apps/payment/Dockerfile
+++ b/apps/payment/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-slim-buster
+FROM python:3.12-slim
 
 # docker settings
 ARG CONTAINER_APP_ROOT=/app