Limits with docker registry on free plan?

I’m using the free plan of Gitlab and created a docker registry. This worked very smoothly but I couldn’t find an answer if there is a limit on the amount or total size of images I can store there.

I checked the description of the free plan and the details. It shows two pieces of information about the docker registry (one is limited to npm) but these are only advanced features and don’t mention any limits in the core docker registry.