Add remote_ip plug

installation/pleroma.nginx

@@ -70,6 +70,7 @@ server {
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
         proxy_set_header Host $http_host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 
         # this is explicitly IPv4 since Pleroma.Web.Endpoint binds on IPv4 only
         # and `localhost.` resolves to [::0] on some systems: see issue #930