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Docker Compose Environment Variable Not Set in Dockerfile - Nginx Redirect Loop Troubleshooting Guide-Fix Cloudflare Wildcard Subdomain Origin Server Errors

2026-07-28 08:58:34
Docker Compose Environment Variable Not Set in Dockerfile - Nginx Redirect Loop Troubleshooting Guide-Fix Cloudflare Wildcard Subdomain Origin Server Errors

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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