Test folder to check if the web application is running
This can be done via a "test" folder in the repository. There are some clarin scripts that do the checking. An example is the docker-vlo project: https://gitlab.com/CLARIN-ERIC/docker-vlo-beta/-/tree/master/test
It is explained here (under "Creating a CLARIN docker image project" on bullet point 7): https://docs.google.com/document/d/1PjIyIUqYbBlpjWpHKljYvzqlqmpI0_yk9RuwAqE253M/edit
You can ask Twan to help understand this issue as well.