Add path to set config file from bootstrap

[zoe-codez]

📬 Changes

• app.bootstrap() is a valid code path for setting config.boilerplate.CONFIG

This triggers the config file loader (must already be enabled) to load a specific path. This was previously exclusively settable via --CONFIG argv

🗒️ Checklist

• Read the contribution guide and accept the
  code of conduct
• Readme and docs (updated or not needed)
• Tests (added, updated or not needed)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.46%. Comparing base (2818464) to head (9bb939c).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #293   +/-   ##
=======================================
  Coverage   97.46%   97.46%           
=======================================
  Files          24       24           
  Lines        1221     1221           
  Branches      247      238    -9     
=======================================
  Hits         1190     1190           
  Misses         30       30           
  Partials        1        1           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.