Automatically determine OS package name

Co-authored-by: Greg Karékinian <greg@karekinian.com>

site-cookbooks/kosmos_gitea/templates/default/nginx_conf_web.erb

@@ -18,6 +18,8 @@ server {
 
   client_max_body_size 121M;
 
+  proxy_intercept_errors on;
+
   location ~ ^/(avatars|repo-avatars)/.*$ {
     proxy_buffers 1024 8k;
     proxy_pass http://_gitea_web;
@@ -52,5 +54,18 @@ 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;
+    error_page 404 = @slow_404;
+  }
+
+  # Slow down 404 responses to make scraping random URLs less attractive
+  location @slow_404 {
+    internal;
+    default_type text/plain;
+    content_by_lua_block {
+      ngx.sleep(10)
+      ngx.status = 404
+      ngx.say("Not Found")
+      ngx.exit(ngx.HTTP_NOT_FOUND)
+    }
   }
 }