Schedule daily image build

[yubrew]

addresses issue #2

docker hub secrets stored securely in github repo

[yubrew]

As mentioned in the issue, this could be solved many ways. I picked Github Actions because it's a solution I am familiar with. GHCR could also work.

[ppolewicz]

Rather than building it ourselves, we should use the images provided by OTF

[yubrew]

Rather than building it ourselves, we should use the images provided by OTF

formalised_tensor suggested referencing subtensor images (https://github.com/opentensor/subtensor/pkgs/container/subtensor). We could change Dockerfile to use latest subtensor. People can mod setup.sh to use whichever subtensor image they want to use, allowing flexibility in choosing:

• current development version
• stao version
• dtao version
• liquid alpha version
• commit reveal version
• schedule_coldkey_swap
• etc