It seems so elegant and I love the "it just works" attitude, and I do understand that docker can't be used everywhere due to its technical (and mental) overhead, but I love it because it allows to isolate everything, freeze everything in time so running a container 5 years for now "just works".
In my humble workflow, I'm using lazydocker to manage the containers, gitlab workflow (action?) for deployment on push and a small VPS to build and push the containers to gitlab registry and to run it, on the same VPS. It's a little bit overkill - I could use a combination of a Dockerfile and a compose.yml with docker compose build. Also, I didn't figure out scaling yet. Good thing I don't need it! Otherwise I would swap docker for k8s and lazydocker for k9s.
(I'm open to suggestions. I just got into devops, and I love it!)