Refactor Docker setup for environment flexibility and dev support

Moved environment variables to .env.template for better management and updated docker-compose files to use them. Added separate docker-compose.dev.yml for development, a Makefile for streamlined commands, and split backend Dockerfile into development and production stages. Updated .gitignore to include new changes.

docker-compose.yml

@@ -4,63 +4,55 @@ services:
     volumes:
       - postgres_data:/var/lib/postgresql/data/
     environment:
-      - POSTGRES_USER=postgres
-      - POSTGRES_PASSWORD=postgres
-      - POSTGRES_DB=eventspace
-    ports:
-      - "5432:5432"
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_DB=${POSTGRES_DB}
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER}"]
       interval: 5s
       timeout: 5s
       retries: 5
     networks:
       - app-network
+    restart: unless-stopped
 
   backend:
     build:
       context: ./backend
       dockerfile: Dockerfile
-    volumes:
-      - ./backend:/app
-      - ./uploads:/app/uploads
-    ports:
-      - "8000:8000"
+      target: production
     environment:
-      - DATABASE_URL=postgresql://postgres:postgres@db:5432/eventspace
-      - SECRET_KEY=your_secret_key_here
-      - ENVIRONMENT=development
-      - DEBUG=true
+      - DATABASE_URL=${DATABASE_URL}
+      - SECRET_KEY=${SECRET_KEY}
+      - ENVIRONMENT=production
+      - DEBUG=false
+      - BACKEND_CORS_ORIGINS=${BACKEND_CORS_ORIGINS}
     depends_on:
       db:
         condition: service_healthy
     networks:
       - app-network
+    restart: unless-stopped
+
   frontend:
     build:
       context: ./frontend
       dockerfile: Dockerfile
+      target: runner
       args:
-        - NEXT_PUBLIC_API_URL=http://backend:8000
-    ports:
-      - "3000:3000"
+        - NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
     environment:
       - NODE_ENV=production
-      - NEXT_PUBLIC_API_URL=http://backend:8000
+      - NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
     depends_on:
       - backend
-    healthcheck:
-      test: ["CMD", "wget", "--spider", "http://localhost:3000"]
-      interval: 10s
-      timeout: 5s
-      retries: 3
     networks:
       - app-network
-
+    restart: unless-stopped
 
 volumes:
   postgres_data:
 
 networks:
   app-network:
-    driver: bridge
+    driver: bridge