

are we just amusing ourselves until death?
Yes, exactly that. There is nothing afterwards, and the fact that we’re clinging to the surface of a rock flying through an infinite universe where we could be wiped out any second and never be able to do anything about it does rather make everything seem rather pointless.
And whilst you could be depressed about that, there’s still a lot of pretty awesome things to do that amusing with. Nature is beautiful. The world and its geology is beautiful. Evolution is beautiful. Science is beautiful. Maths is beautiful (if you have the sort of mind that appreciates it). Learning about these things and experiencing them is beautiful. And so on. Even most people all over the world are pretty good most of the time, despite what some other people want you to believe.
And honestly, accepting there’s no greater purpose is remarkably freeing. When something happens, it’s just bad luck. It’s not some greater power punishing you, it’s not because you did something wrong (within reason - getting hit by a bus because you crossed the road without looking is really pushing the concept).
You need to make your own plan about what’s important to you. Don’t waste time backing up stuff you can quickly download again - like docker images. Just know where the stuff is that you care about (such as any mounted volumes in docker with your own data on) and back that up, and make everything automated. If you do it manually, chances are you’ll gradually stop doing them.
I wrote some things about properly backing up data that may be of use.