adding environment variables

docker-compose.yml

@@ -3,6 +3,8 @@ services:
     container_name: nginx
     restart: unless-stopped
     image: nginx
+    networks:
+      - app-network
     ports:
       - 80:80
       - 443:443
@@ -19,6 +21,8 @@ services:
       - ./certbot/conf:/etc/letsencrypt
       - ./certbot/www:/var/www/certbot
     command: certonly --webroot -w /var/www/certbot --email adam.a.french@outlook.com -d adam-french.co.uk --agree-tos
+    networks:
+      - app-network
 
   backend:
     build:
@@ -26,16 +30,22 @@ services:
       dockerfile: Dockerfile
     container_name: backend
     restart: unless-stopped
-    ports:
-      - 8080:8080
+    # ports:
+    #   - "${BACKEND_PORT}:8080"
+    depends_on:
+      - db
+    networks:
+      - app-network
 
   db:
     image: postgres:16
-    container_name: db
+    container_name: "${POSTGRES_HOST}"
     restart: unless-stopped
     environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: password
-      POSTGRES_DB: db
-    ports:
-      - 5432:5432
+      POSTGRES_USER: "${POSTGRES_USER}"
+      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD}"
+      POSTGRES_DB: "${POSTGRES_DB}"
+    # ports:
+    #   - "${DB_PORT}:5432"
+    networks:
+      - app-network