Update base docker images

[vivekzhere]

• Use alpine-3.13
• Done to fix protecode scan issues
• Use node 14.16 instead of 14.15

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/177316078

The labels on this github issue will be updated when the story is started.

[codecov]

Codecov Report

Merging #1276 (22326f5) into master (54a23db) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1276      +/-   ##
==========================================
- Coverage   71.16%   71.08%   -0.09%     
==========================================
  Files          43       43              
  Lines        3749     3749              
==========================================
- Hits         2668     2665       -3     
- Misses        762      764       +2     
- Partials      319      320       +1     

[coveralls]

Pull Request Test Coverage Report for Build 5209

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 89.16%

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Totals
Change from base Build 5206:	0.0%
Covered Lines:	9447
Relevant Lines:	10224

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💛 - Coveralls