Refused to display in a frame because it set 'X-Frame-Options' to 'deny'

[I-dont-code-til-death]

Describe the bug
Hello guys,
I get the following error in the chrome console when trying to connect to wetty:

Refused to display 'https://pfcloud.ddns.net:8080/' in a frame because it set 'X-Frame-Options' to 'deny'

I already got it to work when accessing it directly. However I need to run it as a reverse proxy with nginx.
I followed this guide you published: https://github.com/butlerx/wetty/blob/main/docs/nginx.md.
Additionally I also have this line in my nginx config, however I dont really know if it has something to do with the error:
add_header Access-Control-Allow-Origin *;

To Reproduce
Steps to reproduce the behavior:

1. Go to https://pfcloud.ddns.net:8080/wetty and you should get get same error.
   You will also get notified that this is a dangerous site. This is I think a side effect of the error as this didn´t occur when I accessed it directly and not through the reverse proxy.
2. Open the console and you should see the exact same error and some others in the console.

Expected behavior
Well my expectation was that it would work exactly as it does when not routing it through a reverse proxy.

[I-dont-code-til-death]

I eventually got it to work with this article.

Maybe this should be added to the nginx reverse proxy guide as a possible fix.