I've done a little research but curious about first hand experience.
I've got a little home server that is full disk encrypted with LUKS (+LVM, of course). It's headless (no display, no keyboard, etc) and just lives attached to the back of my desk, out of the way.
If it gets rebooted due to a power outage, I can plug in a keyboard, wait long enough for it to get to the LUKS password prompt, enter password, hit enter, and assume it worked if I see the disk activity light blinking. Worst case scenario, I can move it to a monitor and plug it in to get display too.
Because lazy, I'd prefer to be able to enter the decrypt password remotely. "Dropbear" seems to be a common suggestion but I haven't tried it yet.
So, asking for your experience or recommendations.
I'll start. Recommendation #1 - get a UPS : D
... But besides that.
Addendum: either way, I currently need to be home to do this because I access it remotely via tailscale along with my desktop. Since both are full disk encrypted, neither will boot to the point of starting tailscale without intervention. But, I might repurpose a nonencrypted RPi with SSHd to act as a "auto restarts with tailscale so I can SSH to it, then SSH to server to enter the LUKS password" jump point.
Looks like you called it. Seems the container image(s) default to a subscription plan ("Starter", free for <50 users) but apparently you can revert to the "Community Edition" which gets rid of it.
Found this post over at the place we no longer speak of :
In the admin settings for your instance you can go to the "Subscription" panel and down at the veeeery bottom is a "Cancel Subscription" button (I'm on the free "starter" subscription, apparently). I'm assuming that's how you back out of it.
Once I have a chance to warn users that I'm about to do something potentially dramatic, I'll test it out and see what happens.
EDIT: Also found this in the RC forums (from 2 years ago) :
O, and the immediate next post is what I described above :