fix: add CORS_ORIGINS env var to add custom domains

[righel]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.12%. Comparing base (429e2e7) to head (6da6a46).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
api/app/main.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #258      +/-   ##
==========================================
- Coverage   75.12%   75.12%   -0.01%     
==========================================
  Files         145      145              
  Lines       10347    10350       +3     
==========================================
+ Hits         7773     7775       +2     
- Misses       2574     2575       +1     

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