refactor: re-use source mapping url

[dnalborczyk]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

[codecov]

Codecov Report

Merging #4351 (f1e3d29) into master (055a7bf) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4351      +/-   ##
==========================================
- Coverage   98.51%   98.51%   -0.01%     
==========================================
  Files         206      205       -1     
  Lines        7332     7329       -3     
  Branches     2084     2084              
==========================================
- Hits         7223     7220       -3     
  Misses         51       51              
  Partials       58       58              

Impacted Files	Coverage Δ
cli/run/build.ts	91.89% <100.00%> (ø)

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[lukastaegert]

👍