Add Matrix homeserver with MatrixRTC calling support

- Synapse + PostgreSQL + coturn + LiveKit + lk-jwt-service
- Caddy entries for mtx.alogins.net, lk.alogins.net, lkjwt.alogins.net
- well-known endpoints for Matrix client/server discovery and RTC transport
- Users: admin, elizaveta, aleksandra

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Caddyfile

@@ -89,6 +89,33 @@ vw.alogins.net {
 	reverse_proxy localhost:8041
 }
 
+mtx.alogins.net {
+	handle /.well-known/matrix/client {
+		header Content-Type application/json
+		header Access-Control-Allow-Origin *
+		respond `{"m.homeserver":{"base_url":"https://mtx.alogins.net"},"org.matrix.msc4143.rtc_foci":[{"type":"livekit","livekit_service_url":"https://lkjwt.alogins.net"}]}`
+	}
+	handle /.well-known/matrix/server {
+		header Content-Type application/json
+		header Access-Control-Allow-Origin *
+		respond `{"m.server":"mtx.alogins.net:443"}`
+	}
+	handle /_matrix/client/unstable/org.matrix.msc4143/rtc/transports {
+		header Content-Type application/json
+		header Access-Control-Allow-Origin *
+		respond `{"foci":[{"type":"livekit","livekit_service_url":"https://lkjwt.alogins.net"}]}`
+	}
+	reverse_proxy localhost:8008
+}
+
+lkjwt.alogins.net {
+	reverse_proxy localhost:8009
+}
+
+lk.alogins.net {
+	reverse_proxy localhost:7880
+}
+
 localhost:8042 {
 	reverse_proxy localhost:8041
     	tls internal