Add documentation of CI/CD processes to README.md

[jmgrady]

This change is 

[codecov-commenter]

Codecov Report

Base: 51.40% // Head: 51.38% // Decreases project coverage by -0.02% ⚠️

Coverage data is based on head (885f228) compared to base (37c4327).
Patch has no changes to coverable lines.

❗ Current head 885f228 differs from pull request most recent head c60126b. Consider uploading reports for the commit c60126b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1757      +/-   ##
==========================================
- Coverage   51.40%   51.38%   -0.03%     
==========================================
  Files         277      277              
  Lines        8569     8569              
  Branches      630      630              
==========================================
- Hits         4405     4403       -2     
- Misses       3658     3661       +3     
+ Partials      506      505       -1     

Flag	Coverage Δ
backend	78.96% <ø> (-0.09%)	⬇️
frontend	32.25% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
Backend/Helper/DuplicateFinder.cs	85.95% <0.00%> (-1.69%)	⬇️
src/utilities.ts	80.64% <0.00%> (+3.22%)	⬆️

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[imnasnainaec]

Reviewed 1 of 1 files at r2, 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @jmgrady)