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Docker Compose Environment Variable Not Working: Fixes - Fix Nginx 502 Bad Gateway: Upstream Connection Refused-Understanding Timeouts in Python Requests

2026-07-28 16:22:58
Docker Compose Environment Variable Not Working: Fixes - Fix Nginx 502 Bad Gateway: Upstream Connection Refused-Understanding Timeouts in Python Requests

Result check

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

Next references

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