--- services: app: secrets: - api_key environment: API_KEY_URL: "file:///keys.json" configs: - source: apikeyfile target: /keys.json mode: 0555 secrets: api_key: external: true name: ${STACK_NAME}_api_key_${SECRET_API_KEY_VERSION} configs: apikeyfile: name: ${STACK_NAME}_apikeyfile_${APIKEYFILE_VERSION} file: apikey.json.tmpl template_driver: golang