This configuration is for a project running Symfony (2 or 3)
I did the image after not founding anything suitable (it was a quick search). If you found a better one, tell me.
The parameter.yml.dist file is supposed to contain sensible default values. Only the password is replaced at runtime.
If you need to replace other values, just add other sed commands to the script node.
I load fixtures before running tests because I rely on a "load once" strategy (I use a bundle to revert all changes done by my tests).
If you prefer to load fixtures inside your tests, you can remove thas command from script
If you need some additional php extension, you can add a line with installation. For example, to install intl extension, use - apt-get update && apt-get install -y -qq php-intl