przebudowa systemu

docker-compose.yml

@@ -1,12 +1,10 @@
-version: '3.8'
-
 services:
   app:
     build: 
       context: .
       dockerfile: Dockerfile
     ports:
-      - "8080:8080"
+      - "${APP_PORT:-8080}:8080"
     volumes:
       - ./instance:/app/instance
     restart: unless-stopped