multi-process container with s6-overlay

exp

• https://github.com/hex-ci/docker-nginx-php-fpm
• https://github.com/recatch/php7-nginx-s6-alpine
• https://github.com/ahmetb/multi-process-container
• https://github.com/seblucas/docker-images/tree/master/alpine-nginx-php

ref

• s6 overlay for containers (includes execline, s6-linux-utils & a custom init)
• docker-and-s6-my-new-favorite-process-supervisor.md
• s6-svscan-1.md
• Docker: why you should use Monit instead of supervisord
• Choosing an init process for multi-process containers