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Cloudflare Error 521: Web Server Down Checklist - Docker Container Stops Immediately on Mac: How to Fix-How to Fix the Git index.lock File Exists Error

2026-07-28 04:34:06
Cloudflare Error 521: Web Server Down Checklist - Docker Container Stops Immediately on Mac: How to Fix-How to Fix the Git index.lock File Exists Error

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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