docs: improve cli docs

[anshumanv]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

NA

Motivation / Use-Case

Clarify CLI docs

Breaking Changes

No

Additional Info

Fixes #2813

[codecov]

Codecov Report

Merging #2815 into master will decrease coverage by 0.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2815      +/-   ##
==========================================
- Coverage   93.77%   93.47%   -0.31%     
==========================================
  Files          34       34              
  Lines        1333     1333              
  Branches      381      381              
==========================================
- Hits         1250     1246       -4     
- Misses         81       85       +4     
  Partials        2        2              

Impacted Files	Coverage Δ
client-src/default/utils/reloadApp.js	95.65% <0.00%> (-4.35%)	⬇️
lib/utils/updateCompiler.js	97.14% <0.00%> (-2.86%)	⬇️
lib/Server.js	96.36% <0.00%> (-0.43%)	⬇️

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[anshumanv]

ahh my bad, already open #2814 😅