Add support for multiple tags

[natescherer]

Hello!
This PR adds support for pushing multiple tags via the existing imageTag input; you can now provide a comma-separated list of tags.

I tested with the following scenarios, both for the GH Action and AzDO Task:

• Single Arch, Multi Tag
• Single Arch, Single Tag
• Single Arch, No Tag 'latest' fallback
• Multi Arch, Multi Tag
• Multi Arch, Single Tag
• Multi Arch, No Tag 'latest' fallback

This will close #151.

Let me know if you have any questions or would like me to make any changes!

[stuartleeks]

Thanks @natescherer! I've had a quick scan of the changes and it looks good so far.

Could you update the docs (root README for GitHub action and under azdo-task for the Azure DevOps task)?

It would also be really good to add some tests that validate that this is working (and keeps working).

[stuartleeks]

Apologies for the delay replying - thanks for updating the docs @natescherer.

Do you have any thoughts about how we could approach automated testing of the multi-tag support?

[chrmarti]

Left a comment, LGTM otherwise, thanks!

[natescherer]

Apologies for the delay replying - thanks for updating the docs @natescherer.

Do you have any thoughts about how we could approach automated testing of the multi-tag support?

No worries on the delay, December and January are extremely busy for me and I haven't had much time for OSS. Here's a test I developed in my own repo that seems to work; hopefully I substituted in the right values for devcontainers/ci.

[stuartleeks]

/test 1f0dea7

[github-actions]

🤖 pr-bot 🤖

🏃 Running tests: https://github.com/devcontainers/ci/actions/runs/4114934939

(in response to this comment from @stuartleeks)

[stuartleeks]

LGTM - thanks!