Using Cloud Build

Save google.credentials.json to Secret Manager as google-identity-cred. The secret will be saved as a google.credentials.json on build and injected inside container.

Example cloudbuild.yaml:

steps:
  - name: gcr.io/cloud-builders/gcloud
    entrypoint: "bash"
    args:
      [
        "-c",
        "gcloud secrets versions access latest --secret=google-identity-cred --format='get(payload.data)' | tr '_-' '/+' | base64 -d > google.credentials.json",
      ]
  - name: "gcr.io/cloud-builders/docker"
    args:
      [
        "build",
        "-t",
        "gcr.io/$PROJECT_ID/github.com/tinymedicalapps/patientcloud",
        ".",
      ]
  - name: "gcr.io/cloud-builders/docker"
    args: ["push", "gcr.io/$PROJECT_ID/github.com/tinymedicalapps/patientcloud"]