problem on 2 redirect

[platini76]

I have two problems.

my homeassistant is on xxx.duckdns.org:8126
all is setup correctly except for the button open webui that want to see the page xxx.duckdns.org:8181
the port on the router is not opened and I don't want to open it.
I just want to redirect on my local address 192.168.0.50:8123
is there a way to do it?

and the second issue:
I setup:
location /mountain/ {
rewrite /mountain/(.*) /$1 break;
proxy_pass http://192.168.0.158;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Scheme $scheme;
proxy_set_header X-Script-Name /calibre-web;
proxy_set_header Origin https://$host;
}

the address correspond to a wled device that has the page setup, when I click on it from HA the result is:

the page is loaded but link inside page are 404 any solution?

[platini76]

noone?