Additional instance of DFG viewer on test server #25
Description
Currently a single public instance https://dfg-viewer.bib.uni-mannheim.de/ is provided.
A 2nd instance would allow testing new releases without affecting that primary instance.
It could also support smoother updates of the primary instance.
More instances could provide different user interfaces and help in decision making with feedback from the user community.
Therefore we should test and document how to run additional instances on different URLs,
for example https://dfg-viewer.bib.uni-mannheim.de/test/.