Don't buffer message bus, this allows us to stream

config/nginx.sample.conf

@@ -220,6 +220,12 @@ server {
       proxy_pass https://avatars.discourse.org/;
     }
 
+    location /message-bus/ {
+      proxy_buffering off;
+      proxy_pass http://discourse;
+      break;
+    }
+
     # this means every file in public is tried first
     try_files $uri @discourse;
   }