* Update entrypoint to allow customization of MySQL engine
* Update fpm images to customize MySQL engine
* Update README for MySQL engine values and default
* Add Dockerfiles for LimeSurvey 5.0
- This changes the default user to www-data in the Apache2 Images
- Removed extra download layer
- Add LS 5.0 Update Guide
- Update base images to PHP 8.0
- Add Variable for showScriptName