Enhance Docker Compose and NGINX configurations

- Added new environment variables for connection pooling in the .env file.
- Updated Docker Compose to ensure consistent naming conventions for containers and added health checks.
- Increased timeout settings in NGINX configuration for file uploads.
- Improved pgAdmin reverse proxy configuration to handle path rewrites.
- Added migration SQL file and updated helper documentation for database operations.

nginx/nginx.conf

@@ -140,6 +140,11 @@ http {
             proxy_set_header X-Forwarded-Host $host;
             proxy_set_header X-Forwarded-Proto $forwarded_proto;
             # End of headers
+            # Increase timeout settings for file uploads
+            proxy_connect_timeout 600;
+            proxy_send_timeout 600;
+            proxy_read_timeout 600;
+            send_timeout 600;
         }
 
         location /admin-api {
@@ -298,6 +303,11 @@ http {
             proxy_set_header X-Forwarded-Host $host;
             proxy_set_header X-Forwarded-Proto $forwarded_proto;
             # End of headers
+            # Increase timeout settings for file uploads
+            proxy_connect_timeout 600;
+            proxy_send_timeout 600;
+            proxy_read_timeout 600;
+            send_timeout 600;
         }
 
         location /admin-api {