Guide HTML "Not found" on Firebase

Hi all,
I am trying to execute a browser.post_connect_cmd="play https://meta-graph-guide.web.app/index.html", showing a simple guide for a docker compose setup with neo4j 4.4 enterprise. I made sure to have access-control-allow-methods: GET, OPTIONS
and access-control-allow-origin: * set up. However, the browser still says it can't find the guide. The same setup works with one of the example html files, e.g. https://neo4j.het.io/guides/hetionet.html. I suspect Firebase to be the culprit, since using the hetionet html on the firebase repo also does not work. Could someone advise how to get this running?

Thanks a lot!

Not sure how you use firebase.
You can serve the html files with a simple python http server like here

Did you configure the server to whitelist your guide URL?

Thanks for the rapid response, Michael! Yes, I did whitelist (everything, "*"). It may well be Firebase, but I checked explicitly for the CORS configuration, which seems to be ok. Maybe it's something else. I just don't know where to look any more.

The reason I didn't go for the python server is that I am running a multi-stage compose setup (GitHub - biocypher/meta-graph at read_only), and wasn't sure where to start that server. I tried with an nginx container and using the compose network functionality, but that also didn't work (same error). You can see that attempt commented out in the compose YAML in the repo.

What do you recommend? Starting the python server in the container built by the official neo4j image?