--- version: "3.8" services: app: environment: - GITEA_MAILER_FROM - GITEA_MAILER_ADDR - GITEA_MAILER_PORT - GITEA_MAILER_USER - "GITEA_MAILER_PROTOCOL=${GITEA_MAILER_PROTOCOL:-smtps}" secrets: - smtp_password secrets: smtp_password: name: ${STACK_NAME}_smtp_password_${SECRET_SMTP_PASSWORD_VERSION} external: true