Cypress port conflicts / local dev fix

[Rory-Powell]

Description

• Prevent port conflicts when running cypress locally alongside account portal
  • Account portal nginx runs on 10001
  • Change 10001 / 10002 in cypress to be 4100 / 4200 for server and worker respectively
  • 1000X gives the impression we are using a proxy, which cypress does not. Use the above to mimic 4001 / 4002
• Update yarn commands to fix local dev

[codecov-commenter]

Codecov Report

Merging #4649 (f37a4ee) into develop (b28d69e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #4649   +/-   ##
========================================
  Coverage    67.91%   67.91%           
========================================
  Files          144      144           
  Lines         4922     4922           
  Branches       761      761           
========================================
  Hits          3343     3343           
  Misses        1105     1105           
  Partials       474      474           

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[shogunpurple]

LGTM