Why Docker Compose Restart Ignores Configuration Changes
Why restarting a Compose service keeps its old mounts and environment, how to confirm the mismatch, and when to use up or down instead.

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Why restarting a Compose service keeps its old mounts and environment, how to confirm the mismatch, and when to use up or down instead.
A deterministic Docker Compose reproduction of Nginx proxying to an old backend IP, including the misleading first test and two runtime DNS fixes.
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