I looked at the docker image i am using in the docker-compose file and this only supports having a single country code. The actual reason can be found here: https://github.com/rtuszik/photon-docker/blob/3b63df49fbc0a77cafcbd6e6be2b8857c12b9143/start-photon.sh#L341C5-L342C7

It is probably possible if you deploy photon on its own and then import the data somehow. But that is to much hassle for me, i think and hope that most of the use case is handled by the current solution. At least for most of the potential users. But I get the point if someone is traveling a lot between countries.

If there is enough demand I could maybe try to create a PR for the Docker image to handle multiple country codes.

I used that once on a past gig and it wasn't very pleasant to use. Especially in combination with spring boot. But that is a couple of years ago. Maybe things have changed. I personally would prefer the executable jar from spring boot. With that you do not have to make that many steps to make it work. But thanks for the suggestion :)