Framadate docker-compose issue: PHP Version
The framadate docker compose uses php:apache - which installs latest stable PHP.
I found that when I tried to create a poll all I got was a blank page after submitting the final step of the form.
Workaround
Change FROM php:apache
in your Dockerfile to FROM php:7-apache
This is a workaround because it's bad to peg an app to an old version of PHP, but it fixes the problem.
Solution idea
Figure out why this page crashes in php > 7 and fix it