Add reverse proxy configuration for Matrix RTC

Added configuration instructions for reverse proxy with nginx for LiveKit Server.

docs/configuring-playbook-matrix-rtc.md

@@ -38,6 +38,29 @@ matrix_rtc_enabled: true
 
 In addition to the HTTP/HTTPS ports (which you've already exposed as per the [prerequisites](prerequisites.md) document), you'll also need to open ports required by [LiveKit Server](configuring-playbook-livekit-server.md) as described in its own [Adjusting firewall rules](configuring-playbook-livekit-server.md#adjusting-firewall-rules) section.
 
+### Behind a reverse proxy
+If you are behind an additional reverse proxy like nginx you also need to adjust it for livekit:
+```yaml
+    location /livekit-server/ {
+        proxy_pass http://localhost:81/livekit-server/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+
+        # Long timeouts for persistent WebSocket connections
+        proxy_read_timeout 86400s;
+        proxy_send_timeout 86400s;
+        proxy_buffering off;
+
+        access_log /var/log/nginx/matrix.access.log;
+        error_log /var/log/nginx/matrix.error.log;
+    }
+```
+
 ## Installing
 
 After configuring the playbook and potentially [adjusting your DNS records](#adjusting-dns-records) and [adjusting firewall rules](#adjusting-firewall-rules), run the playbook with [playbook tags](playbook-tags.md) as below: