feat(docker): Integrate PgBouncer for connection poolingAdd PgBouncer service to the docker-compose setup for improved database connection management. Update .env.example to include new PgBouncer environment variables and service inclusion. Add PgBouncer profiles and tags to docker-compose.yml and override files for local and production configurations. Include PgBouncer initialization script for database user setup

docker-compose.override.production.yml

@@ -12,6 +12,11 @@ services:
     ports:
       - 127.0.0.1:5432:5432
 
+  pgbouncer:
+    restart: unless-stopped
+    ports:
+      - 127.0.0.1=5432:5432
+
   nginx:
     restart: unless-stopped