Customizations via .env file for docker-compose

[ricfio]

Hi @eko, I have added a new .env file (automatically read by docker-compose), so now it's easier to apply environment customizations like:

• change the exposed ports to resolve any conflict on own host
• change the mysql parameters such as: root password, database name, user and password
• change all Xdebug ini parameters including the PHP_XDEBUG_MODE (that replaces "ENABLE_PHP_XDEBUG: 0" if empty)

Right now I'm working on other customizations on nginx, symfony, and so on, so if you have any tips feel you free to ask me.

PS This is my first pull request ever, I hope I did well everything !

[eko]

Hello @ricfio,

Thank you for your first contribution! Everything looks perfect to me :)

I like the idea of having the values centralized in a .env file and allow overriding these values with env variables.