Issue while pushing docker images to GHCR

[ricklambrechts]

Thanks for all the work. Currently checking out this project and trying to set things up.
This is just my experience while folowing the instructions from https://github.com/andreesg/openclaw-terraform-hetzner and maybe we can improve some things for other people.

This repository is a prerequisite for the terraform repository. For me it was not fully clear what I needed to do to have this config repo setup correctly.

At first I just cloned the config repository and set the CONFIG_DIR to the correct path.
All the Quick Start steps where working till the make deploy. As that step will try to load the docker images.

I had the following issues when looking into First-Time Setup of this config repo,

Issues:

• We should make it clear that the user needs to do the docker login with a token with the write:packages scope to push to the GitHub Container registry as the GHCR_TOKEN in the config/inputs.sh needs to be a read-only token for pulling docker images. We could also refer to https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#authenticating-with-a-personal-access-token-classic`.

• The build and push script bash scripts/build-and-push.sh needs the GHCR_USERNAME environment variable, we need to describe that the user needs to source the config/input.sh for example to set this variable.

• For me it is not clear which env I should use / create. There is an exampe in the docker folder https://github.com/andreesg/openclaw-docker-config/blob/main/docker/.env.example, and there is an example in the secrets folder https://github.com/andreesg/openclaw-terraform-hetzner/blob/main/secrets/openclaw.env.example.