deploy/deploy.json

{
  "steps": [
    {
      "name": "golang",
      "env": [
        "GO111MODULE=on"
      ],
      "entrypoint": "bash",
      "args": [
        "-c",
        "go run golang.org/x/playground/cmd/latestgo > /workspace/goversion; echo GO_VERSION=`cat /workspace/goversion`"
      ]
    },
    {
      "name": "gcr.io/cloud-builders/docker",
      "entrypoint": "bash",
      "args": [
        "-c",
        "docker build --build-arg GO_VERSION=`cat /workspace/goversion` -t gcr.io/$PROJECT_ID/playground ."
      ]
    },
    {
      "name": "gcr.io/cloud-builders/docker",
      "args": [
        "push",
        "gcr.io/$PROJECT_ID/playground"
      ]
    },
    {
      "name": "gcr.io/cloud-builders/gcloud",
      "args": [
        "app",
        "deploy",
        "app.yaml",
        "--project=$PROJECT_ID",
        "--image-url=gcr.io/$PROJECT_ID/playground:latest"
      ]
    }
  ],
  "timeout": "3600s",
  "options": {
    "machineType": "N1_HIGHCPU_8"
  }
}