support transforming data to log scale

[hillalex]

See issue: seroanalytics/seroviz#3

This PR adds another optional query parameter scale to the GET /trace endpoint, which allows the provided data to be transformed into log10 or log2 scale.

Also adds a github action for building and pushing Docker images.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.55%. Comparing base (e4e5903) to head (5a5a958).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #3      +/-   ##
==========================================
+ Coverage   90.13%   90.55%   +0.42%     
==========================================
  Files           4        4              
  Lines         223      233      +10     
==========================================
+ Hits          201      211      +10     
  Misses         22       22              

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