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Fix Docker Compose Environment Variable Not Set on Build - Docker Compose Build: Environment Variables Not Set-Fix 'port already allocated' for Nginx in Docker Compose

Updated 2026-07-28 14:53:17browser-issues

Fix Docker Compose Environment Variable Not Set on Build - Docker Compose Build: Environment Variables Not Set-Fix 'port already allocated' for Nginx in Docker Compose

Likely symptom

Likely cause

Safe rollback

Verification route

Repeat the original action, not only a simplified test case.
Restart the app or reload the service after configuration changes.