invalid interpolation format for services.mariadb.environment.MYSQL_USER.
You may need to escape any $ with another $.
required variable MYSQL_USER is missing a value: errMYSQL_DATABASE: ${MYSQL_DATABASE?err}
MYSQL_USER: ${MYSQL_USER?err}
MYSQL_PASSWORD: ${MYSQL_PASSWORD?err}
MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD?err}