servo: gitea: increase client_max_body_size in nginx config

Ben was unable to upload a clone of a repo over HTTP, due to a 413 error.

Nginx's default limit is 1 megabyte ;( https://nginx.org/en/docs/http/ngx_http_core_module.html#client_max_body_size

See https://forum.gitea.com/t/unable-to-push-to-repo-due-to-rpc-failed-http-413-error/2630/4

hosts/by-name/servo/services/gitea.nix

@@ -128,6 +128,9 @@
     forceSSL = true;  # gitea complains if served over a different protocol than its config file says
     enableACME = true;
     # inherit kTLS;
+    extraConfig = ''
+      client_max_body_size 100m;
+    '';
 
     locations."/" = {
       proxyPass = "http://127.0.0.1:3000";