dependabot/dependabot-core image cannot be found

[germa89]

Lastly I am getting the error detailed at the end of this issue.

I have checked docker registry and dependabot/dependabot-core image does not exist. I guess something changed (dependabot developers pull out the image from docker registry?)

##[debug]Starting: Build marcoroth/[email protected]
Build container for action use: '/home/runner/work/_actions/marcoroth/dependabot-bump-together-action/v0.3.1/Dockerfile'.
  /usr/bin/docker build -t ed866e:a421fe560fac47978d915f5d23c2d464 -f "/home/runner/work/_actions/marcoroth/dependabot-bump-together-action/v0.3.1/Dockerfile" "/home/runner/work/_actions/marcoroth/dependabot-bump-together-action/v0.3.1"
  Sending build context to Docker daemon  17.41kB
  
  Step 1/10 : FROM dependabot/dependabot-core
  pull access denied for dependabot/dependabot-core, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
  Warning: Docker build failed with exit code 1, back off 3.562 seconds before retry.
  /usr/bin/docker build -t ed866e:a421fe560fac47978d915f5d23c2d464 -f "/home/runner/work/_actions/marcoroth/dependabot-bump-together-action/v0.3.1/Dockerfile" "/home/runner/work/_actions/marcoroth/dependabot-bump-together-action/v0.3.1"
  Sending build context to Docker daemon  17.41kB
  
  Step 1/10 : FROM dependabot/dependabot-core
  pull access denied for dependabot/dependabot-core, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
  Warning: Docker build failed with exit code 1, back off 8.411 seconds before retry.
  /usr/bin/docker build -t ed866e:a421fe560fac47978d915f5d23c2d464 -f "/home/runner/work/_actions/marcoroth/dependabot-bump-together-action/v0.3.1/Dockerfile" "/home/runner/work/_actions/marcoroth/dependabot-bump-together-action/v0.3.1"
  Sending build context to Docker daemon  17.41kB
  
  Step 1/10 : FROM dependabot/dependabot-core
  pull access denied for dependabot/dependabot-core, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
Error: Docker build failed with exit code 1

[marcoroth]

Yeah, dependabot pulled their images from Docker hub (also see #19 for context)

I have a WIP branch trying to get it back to work again, but it seems that sadly a bunch of stuff broke alongside the migration.

Here is the branch: https://github.com/marcoroth/dependabot-bump-together-action/tree/use-new-containers