Signaling server behind univetnion

UPDATE

UPDATE I managed to get a 503 error: I used a different DNS name for a virtual server entry:

<VirtualHost *:443>

ServerName sig*****.com
ProxyPass "/standalone-signaling/" "ws://192.168.1.72:8080/"
ProxyPassReverse "/standalone-signaling/" "ws://192.168.1.72:8080/"

# Enable proxying Websocket requests to the standalone signaling server

RewriteEngine On
# Websocket connections from the clients.
RewriteRule ^/standalone-signaling/spreed$ - [L]
# Backend connections from Nextcloud.
RewriteRule ^/standalone-signaling/api/(.*) http://192.168.1.72:8080/api/$1 [L,P]

Hello there!

Can someon help me setup Nextcloud signaling server behind an univention server. My Univention server would be the public facing webserver. I set up may signaling server hopefully fine.
BUT I can’t figure out the virtualhost on univention.
My config currently is:

<VirtualHost *:443>

    # ... existing configuration ...

    # Enable proxying Websocket requests to the standalone signaling server.
    ProxyPass "/standalone-signaling/"  "ws://192.168.1.71:8080/"

    RewriteEngine On
    # Websocket connections from the clients.
    RewriteRule ^/standalone-signaling/spreed$ - [L]
    # Backend connections from Nextcloud.
    RewriteRule ^/standalone-signaling/api/(.*) http://192.168.1.71:8080/api/$1 [L,P]

    # ... existing configuration ...

</VirtualHost>

But I only get an 404 error. (I already enabled the site)

I followed this guide:


and this guide:

Thanks in advance!