Update PostgreSQL image to latest and adjust volume path for data persistence

Author: sireeshajonnalagadda

src/ruby-rails-postgres/.devcontainer/docker-compose.yml

@@ -32,7 +32,7 @@ services:
   db:
     # Use PostgreSQL 16 Alpine for stability and smaller image size
     # Pinned version avoids PostgreSQL 18+ compatibility issues with data directory format
-    image: postgres:16-alpine
+    image: postgres:latest
     restart: unless-stopped
     networks:
       - app-network # Connect to the same network as the app container
@@ -46,7 +46,7 @@ services:
       retries: 5 # Retry 5 times before marking as unhealthy
       start_period: 30s # Give PostgreSQL 30 seconds to start before health checks begin
     volumes:
-      - postgres-data:/var/lib/postgresql/data
+      - postgres-data:/var/lib/postgresql
       - ./create-db-user.sql:/docker-entrypoint-initdb.d/create-db-user.sql
     environment:
       POSTGRES_USER: postgres
@@ -74,17 +74,17 @@ services:
       #    password: postgres
       #    database: myapp_test
 
-      # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
-      # (Adding the "ports" property to this file will not forward from a Codespace.)
+    # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
 
-      # Persistent storage for PostgreSQL data
+# Persistent storage for PostgreSQL data
 volumes:
   postgres-data:
     # Named volume ensures data persists across container restarts
     # Located at /var/lib/postgresql/data inside the container
 
-    # Custom bridge network for service communication
-    # Replaces the problematic network_mode: service:db approach
+# Custom bridge network for service communication  
+# Replaces the problematic network_mode: service:db approach
 networks:
   app-network:
     driver: bridge # Standard bridge driver for container-to-container communication