Add alpine 3.13.6 images

[gngeorgiev]

PR Summary

This PR adds preview and stable docker images based on alpine 3.13.6. The new tag is 3.13

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all Dockerfile, .sh, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: to the beginning of the title and remove the prefix when the PR is ready.
• Adds a new image or tag
  • alpine:3.13
• OR
  • Update README.powershellcommunity.md
  • Update vsts-ci.yml

[ghost]

All CLA requirements met.

[RDIL]

Looks fine, and the CI passed. You will also need to sign the CLA though.

[gngeorgiev]

@RDIL Done!

[TravisEz13]

made the requested change for you

[ghost]

Hello @TravisEz13!

Because this pull request has the AutoMerge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

p.s. you can customize the way I help with merging this pull request, such as holding this pull request until a specific person approves. Simply @mention me (@msftbot) and give me an instruction to get started! Learn more here.

[TravisEz13]

thanks @gngeorgiev

[gngeorgiev]

@TravisEz13 @RDIL Do you know when alpine-3.13 will be available as a tag on Dockerhub? I guessed it would be automatic but doesn't appear to be.

[TravisEz13]

@gngeorgiev we release about monthly. We are getting ready to start a release soon. If it's urgent, I can do a docker release.

[gngeorgiev]

@TravisEz13 If you can do the release sometime this week that would be great! Thank you!