Handle Nginx http auth + grafana auth separately

Went down a rabbit hole because I had my "admin" type directory protected by http auth, but the individual apps have their own user auth. The passed authorization header was causing problems with Grafana.

grafana.subfolder.conf.sample

@@ -22,6 +22,10 @@ location ^~ /grafana/ {
     set $upstream_port 3000;
     set $upstream_proto http;
     proxy_pass http://$upstream_grafana:$upstream_port ;
+    
+    # Clear Authorization Header if you are using http auth and normal Grafana auth
+    #proxy_set_header    Authorization       "";
+    
     rewrite ^/grafana/(.*)$ /$1 break;
 
-}
+}