With Docker Compose is a Quickstart very easy. Run the following command:

docker-compose up

and after that open your Browser and go to http://localhost:8080 .

If you have any issues feel free to create an issue on GitHub.

It comes from budrom/docker-rpi-bookstack. He did the initially work to make it working with nginx and fpm. I need a version with only fpm as I already have a nginx that handle ssl stuff