[Docker] Rev alpine linux to 3.7 after testing

[a10kiloham]

• PR is based on the DEVELOP branch
• Don't send big changes all at once. Split up big PRs into multiple smaller PRs that are easier to manage and review
• Read the contribution guide

[codecov-io]

Codecov Report

Merging #3561 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #3561   +/-   ##
========================================
  Coverage    33.02%   33.02%           
========================================
  Files          274      274           
  Lines        34736    34736           
========================================
  Hits         11471    11471           
  Misses       23265    23265

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[medariox]

Is this good to go?

[a10kiloham]

All good

…

On Fri, Jan 5, 2018 at 12:30 PM Dario ***@***.***> wrote: Is this good to go? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3561 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AASBwS5kVs7JGuYZ5UNPXsXXJQV_tfv9ks5tHhXkgaJpZM4RPtO8> .