Installation von Discourse hinter Reverse Proxy mit empfohlener (unterstützter) Installation

Anyone know how I can resolve this issue? The site works, but I notice these errors in the container nginx error.log. I have been using a reverse proxy set up according to these instructions above.

Lookin at /etc/nginx/conf.d/discourse.conf in the container, I see

upstream discourse { server 127.0.0.1:3000; }

Should that be somethig like?:  

upstream discourse { http://unix:/var/discourse/shared/standalone/nginx.http.sock; }

Looking in /var/log/nginx in the container, I see errors like:

2025/02/09 21:00:21 [error] 69#69: *1 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xx.xxx.xxx, server: _, request: "POST /message-bus/b39980c2387e4750bc1e320cb6195424/poll?dlp=t HTTP/1.1", upstream: "http://127.0.0.1:3000/message-bus/b39980c2387e4750bc1e320cb6195424/poll?dlp=t", host: "discourse.xxxx.com"

2025/02/09 21:00:23 [error] 67#67: *3 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xx.xx.xxx, server: _, request: "GET /chat/api/me/channels HTTP/1.1", upstream: "http://127.0.0.1:3000/chat/api/me/channels", host: "discourse.xxxx.com"

2025/02/09 21:00:23 [error] 70#70: *5 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xx.xx.xxx, server: _, request: "POST /message-bus/d95b6999d26242f28f4875732b195440/poll HTTP/1.1", upstream: "http://127.0.0.1:3000/message-bus/d95b6999d26242f28f4875732b195440/poll", host: "discourse.xxxx.com"

Thank you!