check health of service in docker

cloudbuild.yaml

  - name: 'gcr.io/cloud-builders/docker'
    id: build
    entrypoint: bash
    args:
    - "-c"
    - |
        docker run --net=cloudbuild  -p 8080:8080 --name srv -d gcr.io/${_PROJECT_NAME}/myapp:${SHORT_SHA}  
        API_STATUS=$(curl --fail -i --retry 3 --retry-delay 2 --retry-connrefused 'http://srv:8080/api/status' | grep HTTP | cut -d' ' -f2)
        echo "API Status: $$API_STATUS"
        if [ "200" != "$$API_STATUS" ]; then
          echo "Error [API status: $$API_STATUS]"
          exit 1
        fi