The docker-compose.single-domain.yaml was missing a call to the templater script.
As a result, the first run would fail unless docker-compose.yaml was started before.
Closes#947Closes#957
API_URL is still accepted for BC compatibility of the self-hosted deployments.
This will allow deploying on a single domain, using a reverse proxy that acts on the path.
This however means that the config needs to be changed for all WorkAdventure deployments.