Ask HN: Self Hosting Projects?

I build browser extensions, and the reason I enjoy building them is that they cost me nothing, they scale infinitely so I don’t worry about architecture, yet people get value out of them

So for a change I want to build web-apps for people and THEY can handle the scaling/database themselves - so it costs me nothing.

Can this be achieved by open source, Docker, and self-hosting?

Basically docker containers for backend, frontend, and db, and docker-compose to orchestrate. Open source so others can contribute. Self hosting free projects?

Am I on the right track with my thinking?