perf: limit concurrent connections

Author: Naramsim

Resources/nginx/nginx.conf

@@ -56,6 +56,7 @@ http {
     }
 
     limit_req_zone $limit_key zone=graphqlDefaultLimit:50m rate=1r/m;
+    limit_conn_zone $binary_remote_addr zone=addr:20m;
 
     server {
         listen 80 deferred;
@@ -66,6 +67,7 @@ http {
 
         client_body_timeout 5s;
         client_header_timeout 5s;
+        limit_conn addr 10;
 
         # Admin console
         location /graphql/admin/ {