Buildkit: Create a tag for 0.8-beta or 0.8-rc1

[skaegi]

We're currently testing with the 0.8-beta image. We really appreciate you posting this build as it contains a fix necessary to work with some private repositories that we really needed.

Would it be possible to have a tag created for it, or for 0.8-rc1 so we can track against what was used to create it.
Thanks.

[AkihiroSuda]

This one might need to be resolved before v0.8 https://github.com/moby/buildkit/issues/1727

Not a blocker for beta releases, I guess

[tonistiigi]

The image was made for some testing, we'll tag when rc1 is ready.

You can always run --version on the image to figure out the source commit.

# docker run --rm moby/buildkit:v0.8-beta --version
buildkitd github.com/moby/buildkit 7f42dbf 7f42dbf9b41c0de89c744823054ab8e7c4020c68

[skaegi]

Hurray 0.8-rc1 is out... closing!