feat: add docker image

[lidel]

This PR is based on #10

Borrows the most minimal set of conventions from Kubo and IPFS Cluster:

• every commit on main branch is can be run via own image named main-YYYY-DD-MM-commit
• we can also start doing releases in the future
  • git tags are translated to Docker tags with the same names (v0.0.0)
  • latest git tag is also tagged as latest and release

TODO

• merge feat: initial functional version #10 first and update flags in Dockerfile
• set DOCKER_USERNAME and DOCKER_PASSWORD in this repo

[galargh]

Did we end up agreeing on what DockerHub account to use? Is it the ipfsbot one? If so, I can set up the creds.

[lidel]

@galargh yes, we will be using ipfsbot, publishing to https://hub.docker.com/r/ipfs/
If you can set up creds in this repo 🙏 , then I can rebase this PR, and we should be done.

[lidel]

Rebased and set credentials to one from a vault shared with me. I suspect DOCKER_PASSWORD is outdated because it was not changed in the vault since 2021, but if the build in main fails to publish, we can update secret and re-run.

Merging to see how it behaves.