docker-compose/pkg/e2e/fixtures/build-test/secrets/compose.yml

services:
  ssh:
    image: build-test-secret
    build:
      context: .
      secrets:
        - mysecret
        - source: envsecret
          target: build_secret

secrets:
  mysecret:
    file: ./secret.txt
  envsecret:
    environment: SOME_SECRET