enhance Docker setup documentation and configuration options

docker-compose.yml

@@ -6,21 +6,21 @@ services:
       context: ./surfsense_web
       dockerfile: Dockerfile
     ports:
-      - "3000:3000"
+      - "${FRONTEND_PORT:-3000}:3000"
     volumes:
       - ./surfsense_web:/app
       - /app/node_modules
     depends_on:
       - backend
     environment:
-      - NEXT_PUBLIC_API_URL=http://backend:8000
+      - NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL:-http://backend:8000}
 
   backend:
     build:
       context: ./surfsense_backend
       dockerfile: Dockerfile
     ports:
-      - "8000:8000"
+      - "${BACKEND_PORT:-8000}:8000"
     volumes:
       - ./surfsense_backend:/app
     depends_on:
@@ -28,7 +28,7 @@ services:
     env_file:
       - ./surfsense_backend/.env
     environment:
-      - DATABASE_URL=postgresql+asyncpg://postgres:postgres@db:5432/surfsense
+      - DATABASE_URL=postgresql+asyncpg://${POSTGRES_USER:-postgres}:${POSTGRES_PASSWORD:-postgres}@db:5432/${POSTGRES_DB:-surfsense}
       - PYTHONPATH=/app
       - UVICORN_LOOP=asyncio
       - UNSTRUCTURED_HAS_PATCHED_LOOP=1
@@ -36,13 +36,26 @@ services:
   db:
     image: ankane/pgvector:latest
     ports:
-      - "5432:5432"
+      - "${POSTGRES_PORT:-5432}:5432"
     volumes:
       - postgres_data:/var/lib/postgresql/data
     environment:
-      - POSTGRES_USER=postgres
-      - POSTGRES_PASSWORD=postgres
-      - POSTGRES_DB=surfsense
+      - POSTGRES_USER=${POSTGRES_USER:-postgres}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-postgres}
+      - POSTGRES_DB=${POSTGRES_DB:-surfsense}
+
+  pgadmin:
+    image: dpage/pgadmin4
+    ports:
+      - "${PGADMIN_PORT:-5050}:80"
+    environment:
+      - PGADMIN_DEFAULT_EMAIL=${PGADMIN_DEFAULT_EMAIL:-admin@surfsense.com}
+      - PGADMIN_DEFAULT_PASSWORD=${PGADMIN_DEFAULT_PASSWORD:-surfsense}
+    volumes:
+      - pgadmin_data:/var/lib/pgadmin
+    depends_on:
+      - db
 
 volumes:
-  postgres_data: 
+  postgres_data:
+  pgadmin_data: