* Overwrite apache listen port in Apache configuration if configured via environment variable LISTEN_PORT
* Add documenation to README
* Add default value to ENV vars documentation
Co-authored-by: Michael Prankl <michael.prankl@muenchen.de>
Limesurvey 3.0 won't support the encyption introduced in LS4, so the variables and the check for security.php isn't necessary in the entrypoint.sh files.