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.

helper.md

@@ -1 +1,5 @@
-docker exec -it phx-phoenix-system-1 sh
+docker exec -it phx-phoenix-system-1 sh
+
+rm -rf https_portal/data https_portal/log
+
+docker exec -i phoenixDB psql -U postgres -d phoenix < migration.sql