The FLAT Server is publicly available as a Docker image: So, make sure you have Docker installed on your system or an alternative means to download and run Docker images off Docker Hub.


The latest image provides you with the most recent stable official release. A beta image with brand-new features is also available.

You can use the flat command line tool to pull the latest release or beta image:

$ flat pull


$ flat pull -b


To run the server, simply start the Docker container with the flat CLI:

$ flat start

Add the -b option to start a container based on the beta release:

$ flat start -b

To use a specific image, provide the respective release number as TAG environment variable, for example

$ TAG=20200409 flat start