Deploying grav to zeit now

I’m having a hard time deploying docker containers to now of the CMS called grav (getgrav.org).

I found this docker container online https://github.com/andreaschiona/grav-dokerized and was able to deploy without any errors. But once I goto the url https://andreaschiona-grav-dokerized-echaqoadgr.now.sh/ I get an error.

What’s the best way to deploy php projects to zeits now and still have the ability to upload themes and plugins etc…