Update nginx config

support/nginx/cyclassist.conf

@@ -1,4 +1,6 @@
-# UWSGI proxy pass
+# API rate limitation
+limit_req_zone $binary_remote_addr zone=cycloAPI:10m rate=1r/s;# UWSGI proxy pass
+
 upstream _cyclassist {
     server unix:/run/uwsgi/app/cyclassist/socket;
 }
@@ -44,6 +46,7 @@ server {
 
     # Proxy pass the API calls to the server part
     location /api {
+        limit_req zone=cycloAPI burst=3 nodelay;
         include uwsgi_params;
         uwsgi_pass _cyclassist;
     }