one-click-apps: n8n one-click-app doesn't work out of the box

n8n has special needs from its reverse proxy for the communication between the webapp and the server. The following nginx config makes it work right.

            proxy_pass $upstream;
            proxy_set_header Host $host;
            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;

            proxy_set_header Connection '';
            proxy_http_version 1.1;
            chunked_transfer_encoding off;
            proxy_buffering off;
            proxy_cache off;