fix: update docs & dockerfile for building assets

[thonatos]

Checklist

• [ ] npm test passes
• [ ] tests and/or benchmarks are included
• [x] documentation is changed or added
• [x] commit message follows commit guidelines

Affected core subsystem(s)

Description of change

[codecov[bot]]

Codecov Report

Merging #95 into master will increase coverage by <.01%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #95      +/-   ##
==========================================
+ Coverage   92.57%   92.57%   +<.01%     
==========================================
  Files          37       37              
  Lines        1306     1307       +1     
==========================================
+ Hits         1209     1210       +1     
  Misses         97       97

Impacted Files	Coverage Δ
config/config.default.js	100% <100%> (ø)	:arrow_up:

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