Simplify mongodb example by using preset

[vladholubiev]

Summary

I've just published a Jest preset to simplify usage. Since I was the author of the original tutorial, the code underneath remained the same

Test plan

[codecov-io]

Codecov Report

Merging #8318 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #8318   +/-   ##
=======================================
  Coverage   62.17%   62.17%           
=======================================
  Files         266      266           
  Lines       10683    10683           
  Branches     2597     2597           
=======================================
  Hits         6642     6642           
  Misses       3452     3452           
  Partials      589      589

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[SimenB]

Thanks! Way cleaner 🙂

Could you update the versioned docs?

[vladholubiev]

Sure thing, @SimenB!

I've just updated the versioned docs!

[github-actions]

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