dockerfile: new reference location

[crazy-max]

needs moby/buildkit#2902

Dockerfile reference is now located in the BuildKit repository.

Preview: https://deploy-preview-14948--docsdocker.netlify.app/engine/reference/builder/

Signed-off-by: CrazyMax crazy-max@users.noreply.github.com

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[thaJeztah]

Perhaps we should start to consider using /reference/xxxx again for URLs instead;

• /reference/dockerfile/
• /reference/commandline/xxx etc

[crazy-max]

Hum indeed good point

[crazy-max]

Keeping in /engine/reference/builder/ for now. Let's do the slug change in a follow-up.

[crazy-max]

@thaJeztah As discussed on Slack, we don't fetch from a release branch but master branch of the BuildKit repository for reference docs. Will open a follow-up PR on BuildKit to mark new features as suggested.

I have started to work on the Dockerfile reference changelog that will be on this repo in a dedicated page so we can cross-link with sections in reference docs but we need to first update the slug as the Dockerfile reference is not a section atm: /engine/reference/builder. Like you said we could switch to /reference/dockerfile/ to access reference docs and in the same spirit have /reference/dockerfile/release-notes for dockerfile changelog. WDYT @thaJeztah?

[crazy-max]

Simplified this PR now that #14799 is merged. No need extra plugin to move pages around as the correct reference is picked up by fetch remote plugin to create edit and issue link: https://deploy-preview-14948--docsdocker.netlify.app/engine/reference/builder/

[usha-mandya]

@thaJeztah are we good to merge this PR? Thanks

[thaJeztah]

LGTM