Create a DockerHub account for Hermes

[W3Edd]

If we want to make a public Docker image for Hermes, available for anyone to download, we need a permanent DockerHub account for Hermes, or for an organization that will handle this project and others.

Once the account is done, a couple of GitHub secrets need to be set.
As included in the PR to build and publish the image, the secret DOCKERHUB_ID needs to hold the ID of the DockerHub account, and the secret DOCKERHUB_TOKEN will have a secret token to identify against DockerHub when pushing an image.

[DarthTigerson]

In progress

[W3Edd]

I'll link this here.
We can close both when this is set.