App mounting directory

[frankvp11]

Currently, NiceGUI mounts everything to _nicegui/ or some derivative of that (_nicegui_ws/, etc.)
Is it possible (or does it already exist) that NiceGUI supports a parameter in ui.run (or elsewhere) for us to choose where these things are mounted?
The only relevant discussion that I found regarding this was #1302
The use case for this is when you want to reverse proxy. I have a few webapps that I want to put under the same domain name. They are all running on different ports, and so I want to reverse proxy them to different ports based on the url path.
Think of it like this:
Suppose https://nicegui.io/ runs on port=8000.
Then you'd have a completely different service for the documentation https://nicegui.io/documentation running on port=8001. I'd like the button for Documentation on port 8000 to put me to port 8001.
The problem that I'm running into is that because NiceGUI mounts everything on _nicegui/, I am getting these errors:

Failed to load module script: Expected a JavaScript-or-Wasm module script but the server responded with a MIME type of "text/html". Strict MIME type checking is enforced for module scripts per HTML spec.Understand this error
_nicegui/2.21.1/components/b4c064b91ab9d1056eddd5db7a4b60a7/header.js:1 Failed to load module script: Expected a JavaScript-or-Wasm module script but the server responded with a MIME type of "text/html". Strict MIME type checking is enforced for module scripts per HTML spec.Understand this error
socket.io.min.js:1 Uncaught SyntaxError: Unexpected token '<' (at socket.io.min.js:1:1)Understand this error
tailwindcss.min.js:1 Uncaught SyntaxError: Unexpected token '<' (at tailwindcss.min.js:1:1)Understand this error
vue.global.prod.js:1 Uncaught SyntaxError: Unexpected token '<' (at vue.global.prod.js:1:1)Understand this error
quasar.umd.prod.js:1 Uncaught SyntaxError: Unexpected token '<' (at quasar.umd.prod.js:1:1)Understand this error
nicegui.js:1 Uncaught SyntaxError: Unexpected token '<' (at nicegui.js:1:1)Understand this error
en-US.umd.prod.js:1 Uncaught SyntaxError: Unexpected token '<' (at en-US.umd.prod.js:1:1)Understand this error

Looking at the sources, I am on the admin/ page, but everything that I need is on _nicegui

With this, another question is, would this even solve the problem?

Extra:
For the HTTPS server, this is a (relevant) snippet of my conf:

        location /admin/ {
            proxy_pass http://admin:8000/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;

            # WebSocket support (already needed for admin, per your config)
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }

[rodja]

Have you seen our nginx subpath example? There we show a configuration on how to reverse proxy using the X-Forwarded-Prefix:

nicegui/examples/nginx_subpath/nginx.conf

Lines 52 to 54 in 8ad98f8

	proxy_pass http://app:8080/$1?$args;
	proxy_set_header X-Forwarded-Prefix /nicegui;
	proxy_redirect http://app:8080/ /nicegui/;