route /xrpc/social.grain.* to appview

services/nginx/nginx.conf

···
       return 403;
     }
 
+    location ~ ^/xrpc/social\.grain\..* {
+      proxy_pass $appview;
+      proxy_set_header Host $host;
+      proxy_set_header Upgrade $http_upgrade;
+      proxy_set_header Connection $connection_upgrade;
+    }
+
     location /xrpc {
       proxy_pass $pds;
       proxy_set_header Host $host;