Added client_max_body_size option to nginx config

docs/firststeps-rp.md

@@ -61,6 +61,7 @@ server {
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
+        client_max_body_size 100m;
     }
     [...]
 }