update php7

TODO

-- Fix permissions
-- Setup nginx configuration (per module or per docker-compose ?)
-- Split docker-compose file into deployement and development version
-- Setup persistent storage (db, ...) for dev, version (and deployement ?)
-- Use environnement variables for user / password (only for dev. ?)
-- Test everything and add tests (especially for install script).
-- Investigate MongoDB key issue or change way to init database
-- Investigate .htaccess to provide alternative
-- Protect files that should not be accessed to be accessed.

docker-install/install-conf/supervisord.conf

-[supervisorctl]
-serverurl = http://front:9001