This is an unofficial dockerized version of EspoCRM.
It doesn't have custom settings, just attach a mysql container and launch it. If you want, you can use docker-compose with this command:
docker-compose -f docker-compose.yml up
and go to http://localhost:8888/install for the initial wizard.
This image uses Ubuntu 18.04, PHP 7.2 and EspoCRM version 6.0.9.
If you need another version, just change ESPO_VERSION env and build a new image.
It is important to mount a volume into the container at /var/www/data, otherwise configuration and uploads will be lost following a container restart.