Route MSC3916 stable endpoints to development MMR (#592)

dev/homeserver.nginx.conf

@@ -14,7 +14,12 @@ server {
       proxy_pass http://host.docker.internal:8001;
     }
 
-    location /_matrix/client/unstable/org.matrix.msc3916 {
+    location /_matrix/client/v1/media {
+      proxy_set_header Host localhost;
+      proxy_pass http://host.docker.internal:8001;
+    }
+
+    location /_matrix/federation/v1/media {
       proxy_set_header Host localhost;
       proxy_pass http://host.docker.internal:8001;
     }