Setup Sentry monitoring manually

[cesarvarela]

closes #3261

Navigating to https://pr-3352--staging-aiid.netlify.app/apps/submitted/ should send transactions to Sentry.

Two new environment variables need to be set on Netlify:

SENTRY_DSN= # from Sentry 
SENTRY_ENVIRONMENT= # should be one of: production, staging, or development (additional envs could be configured if necessary)

Sentry also allows profiling the function, but I couldn't get it working with the current Netlify functions bundler.

Note. I call this "manually" because Netlify allows installing a Sentry integration via UI. Still, it seems it is not working or has been abandoned, partly because they seem to be deprecating "Integrations" in favor of "Extensions."..

[codecov]

Codecov Report

Attention: Patch coverage is 67.24138% with 38 lines in your changes missing coverage. Please review.

Project coverage is 95.88%. Comparing base (582e04c) to head (564aebf).
Report is 6 commits behind head on staging.

Files with missing lines	Patch %	Lines
site/gatsby-site/src/utils/serverless.ts	28.57%	20 Missing ⚠️
site/gatsby-site/sentry-instrumentation.ts	75.67%	18 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #3352      +/-   ##
===========================================
- Coverage    96.13%   95.88%   -0.26%     
===========================================
  Files           71       72       +1     
  Lines        13702    13812     +110     
  Branches       265      411     +146     
===========================================
+ Hits         13172    13243      +71     
- Misses         530      556      +26     
- Partials         0       13      +13     

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