Google Cloud Run运行状况检查因Docker-Compose而失败

Question

我正在尝试将后端上传到Google Cloud Run。我正在使用具有2个组件的Docker-Compose：一个Golang服务器和一个Postgres DB。

当我在本地运行Docker-Compose时，一切正常！当我使用

上传到Gcloud时

gcloud builds submit . --tag gcr.io/BACKEND_NAME

gcloud run deploy --image gcr.io/BACKEND_NAME --platform managed

Gcloud的运行状况检查失败，卡在Deploying... Revision deployment finished. Waiting for health check to begin.上并抛出Cloud Run error: Container failed to start. Failed to start and then listen on the port defined by the PORT environment variable. Logs for this revision might contain more information.

我了解到Google Cloud Run提供了一个PORT环境变量，我试图在我的docker-compose.yml中进行解释。但是命令仍然失败。我没主意了，这里可能出什么问题了？

这是我的docker-compose.yml

version: '3'
services:
  db:
    image: postgres:latest # use latest official postgres version
    container_name: db
    restart: "always"
    environment:
      - POSTGRES_USER=user
      - POSTGRES_PASSWORD=pass
      - POSTGRES_DB=db
    volumes:
      - database-data:/var/lib/postgresql/data/ # persist data even if container shuts down
  api:
    container_name: api
    depends_on: 
      - db
    restart: on-failure
    build: .
    ports: 
      # Bind GCR provided incoming PORT to port 8000 of our api
      - "${PORT}:8000"
    environment:
      - POSTGRES_USER=user
      - POSTGRES_PASSWORD=pass
      - POSTGRES_DB=db
volumes:
  database-data: # named volumes can be managed easier using docker-compose

和api容器是Golang二进制文件，它在调用http.ListenAndServe(":8000", handler)之前等待与Postgres DB建立连接。