Add publish docker workflow

[tparsa]

Publish docker image to Docker Hub with version and sha.

[jetstack-bot]

Thanks for your pull request. Before we can look at it, you'll need to add a 'DCO signoff' to your commits.

📝 Please follow instructions in the contributing guide to update your commits with the DCO

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The list of commits missing DCO signoff:

• 03ea58a feat: Add Sotoon solver
• 6ad6542 Merge pull request Build and deployment fixes #1 from yn360/feat/add-sotoon-solver
• 8dce018 feat: Add publish docker workflow

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[jetstack-bot]

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[jetstack-bot]

Hi @tparsa. Thanks for your PR.

I'm waiting for a cert-manager member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[tparsa]

Sorry, apparently I opened this PR by accident.