[Dockerfiles] add: a workflow to check if docker containers can be built in case of modifications

[sayakpaul]

No description provided.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[DN6]

What exactly would we be testing here? That the build completes?

[sayakpaul]

Yeah.

[DN6]

Can't we just run the existing workflow? Or just update the docker build workflow to run on change? Why add another workflow?

[sayakpaul]

Can't we just run the existing workflow?

Integrating a change after ensuring it successfully passes is what I would like to keep in mind here. We could have easily avoided the problem that warranted this PR then: #7155.

Or just update the docker build workflow to run on change? Why add another workflow?

I can look into this.

[DN6]

Very nicely done! 👍🏽

[sayakpaul]

@DN6 turns out the workflow doesn't show up on the PR strangely, but you can see it here: https://github.com/huggingface/diffusers/actions/runs/8144706116/job/22259379215. I have also made the code simpler and a bit more explicit. So, would appreciate another review.

I explicitly changed a Dockerfile to test things out but will remove that change once you approve the PR.

[sayakpaul]

@DN6 good to merge?