add app to compose file

compose.yaml

@@ -1,4 +1,20 @@
 services:
+  app:
+    build: .
+    container_name: django-app
+    ports:
+      - "80:8000"
+    depends_on:
+      - db
+      - adminer
+    environment:
+      DATABASE_NAME: ${DATABASE_NAME}
+      DATABASE_USERNAME: ${DATABASE_USERNAME}
+      DATABASE_HOST: "db"
+      DATABASE_PASSWORD: ${DATABASE_PASSWORD}
+      DATABASE_PORT: ${DATABASE_PORT}
+    env_file:
+      - .env
   db:
     image: postgres
     restart: always
@@ -12,6 +28,7 @@ services:
     #      size: 134217728 # 128*2^20 bytes = 128Mb
     ports: 
       - "5432:5432"
+    container_name: postgres
       
     environment:
       POSTGRES_USER: sa