It probably would be easier to just write an “update Caddy” script. They don’t release updates very often, except for security fixes, so it’s not much effort to do manually. I automated mine with Forgejo Actions, you could do the same with GitHub actions as a free option for example. Lots of neat ways to accomplish this!
Xcaddy is a build tool. Caddy plugins are built into Caddy itself for optimization purposes, so xcaddy essentially makes you a custom version of Caddy. It only conflicts with Caddy so much as building a new version would conflict with the old version. You still get a normal “Caddy” executable after running xcaddy, just replace your existing Caddy with the new one created by xcaddy!
I run the setup you’re aiming for, and as the other guy said, DNS challenge is the way to go. That’s what I do, and it works beautifully. It even works with Caddy auto-https, you just need to build Caddy with the cloudflare-dns plugin.
@wesker@lemmy.sdf.org if it helps, the Symfonium dev is open to de-googled licensing via Ko-Fi donations. See the forum post here: https://support.symfonium.app/t/how-can-i-pay-for-symfonium-without-google-play
Per Tolriq’s responses there, you can get the APK safely from the Aurora Store.