it works!

docker-compose.dev.yml

@@ -20,6 +20,16 @@ services:
    #   options:
    #     max-size: '10m'
 
+  worker1:
+    build: .
+    command: [ "node", "deliveryWorker.js" ]
+    restart: always
+    env_file: '.env'
+    environment:
+      DB_URL: 'mongodb://mongodb:27017'
+    depends_on:
+      - mongodb
+
   mongodb:
     image: mongo:4.2
     restart: always