Hi @Se_Ke, welcome to the community!
The short answer is yes, you can. There are a couple of ways to do this and the best approach depends on your technical background and requirements.
The easiest way would be to use n8n’s tunnel service, though this isn’t suitable for production usage as there are no uptime guarantees. There are no prerequisites here other than adjusting your command to start n8n.
For a more advanced (but still relatively easy to manage) setup, you could consider Cloudflare tunnels as suggested by @RedPacketSec over here. This is assuming you are using Cloudflare in the first place and are willing to let them handle SSL termination of your traffic. You’d essentially install a small daemon, pick a (sub-)domain for n8n, and finally tell Cloudflare to send all traffic to your local n8n server’s IP/port (and tell n8n which domain you are using by updating the WEBHOOK_URL environment variable).
There are also additional options available such as setting up a reverse proxy on your web server, assuming your n8n server has a public IP.
In all cases you want to set a strong password for your n8n user.