update inputs to build-push-to-dockerhub action

[joeyorlando]

• Adds the following inputs which are needed to migrate this Drone pipeline in grafana/oncall:
  • build-args
  • target
  • cache-to
  • cache-from
• Modifies the action to allow pushing images to Dockerhub from all GitHub Actions event types except pull_request (previously the logic here was to only allow pushing on a build triggered from a push event)

Closes #80

[dsotirakis]

looks like you are also tackling #80 @joeyorlando. you could update the description to make sure the caching inputs updates are not missed.

[joeyorlando]

@dsotirakis you mean like updating the PR's description to add the "closes <issue_number" indicator?

[dsotirakis]

Adds build-args and target inputs which are needed to migrate

yes and also

Adds build-args and target inputs which are needed to migrate

to include caches as well

[joeyorlando]

done!

needs one change - otherwise the flow will be broken

[Elfo404]

🚢 🇮🇹