Merge pull request docker#100 from crazy-max/explicit-semver

Explicit version spec for caching

Merge pull request docker#100 from crazy-max/explicit-semver

Explicit version spec for caching

Merge pull request docker#99 from crazy-max/build-ref

Allow building buildx from source

Merge pull request docker#97 from crazy-max/fix-get-buildkit-version

Fix `docker: invalid reference format`

Merge pull request docker#95 from crazy-max/dev-deps

Update dev deps

Merge pull request docker#72 from crazy-max/buildkit-version

Display BuildKit version

Merge pull request docker#71 from crazy-max/remove-limitation

Remove os limitation

Merge pull request docker#63 from crazy-max/doc

Fix doc links

Merge pull request docker#50 from crazy-max/disable-clipping

Revert BuildKit step log limits tweak

Merge pull request docker#46 from crazy-max/disable-clipping

Tweak BuildKit step log limits