Is there a solution to the alist problem?

admin

The server is down, I used it after dd. First, I installed alist (no code attached). Then I installed caddy (one line at a time).
I updated the package list and upgraded. I added the Debian keyring, archive keyring and transport https to apt-get.
Then I downloaded the gpg key from the Cloudsmith website and used it to add the Caddy Stable Archive Keyring GPG key.
Next, I downloaded the debian deb file from the Cloudsmith website and placed it in /etc/apt/sources.list.d directory. I updated the package list again and installed caddy.
Now, I need to edit the caddyfile. Remove all content and replace with this:
xxx.com { encode gzip tls abcd@gmail.com reverse_proxy 127.0.0.1:5244 }
Save and exit the vim editor.
Restart caddy.
When I visit the domain, I'm getting server 521 error. What's wrong with mjj? Please help!