Move from docker.io to gtihub

[peterdudfield]

The following repos need to move to github, to store the docker images.

This is done by using the most recent github workflows

• blend - https://github.com/openclimatefix/uk-pv-forecast-blend
• forecast:site - https://github.com/openclimatefix/pv-site-production
• consumer: neso forecast - upgrade on airflow - TODO
• consumer: pv - https://github.com/openclimatefix/PVConsumer
• consumer: pvlive - https://github.com/openclimatefix/pvlive-consumer