Do you want to expose port 80/443 and set up a reverse proxy or do you want to use a VPN tunnel? You could just use SSH to port 80 and 443 like so: ssh -L 80:<local-server-ip>:80 -L 443:<local-server-ip>:443 <username>@<domain>

I expose port 80/443 and use Caddy as a reverse proxy together with Authelia to protect anything that I deem needs an extra layer of security. I followed this guide: caddy.community/t/…/20465

Once setup, it is easy to remove or add a backend to Caddy and Authelia. This way does mean that you sometimes need to log in twice, but that is a small price to pay if your backend app does not support SSO (like n8n community edition).