fix: add missing env vars to set up guide

[aeneasr]

Closes #3828

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
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• I confirm that this pull request does not address a security
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• I have added tests that prove my fix is effective or that my feature
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• I have added or changed the documentation.

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.96%. Comparing base (ad0619d) to head (3c82467).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3855      +/-   ##
==========================================
- Coverage   78.01%   77.96%   -0.05%     
==========================================
  Files         359      359              
  Lines       25203    25203              
==========================================
- Hits        19662    19650      -12     
- Misses       4034     4044      +10     
- Partials     1507     1509       +2     

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[thedjpetersen]

Tested locally and confirmed as working

[thedjpetersen]

Might be worth just updating the getting started guide as well