Dockerized Phalcon Dockerfile uses following build-time variables: PHP_IMAGE_TAG and PHALCON_VERSION All images (except latest tag) builded by Travis CI (See .travis.yml). Supported tags: 7.1-fpm-3.1.2 5.6-fpm-2.0.10 https://hub.docker.com/r/braska/php-fpm-phalcon/