Update alpine Docker tag to v3.12 - autoclosed

This MR contains the following updates:

Package	Type	Update	Change
alpine	final	minor	3.11 -> 3.12

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Renovate configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Enabled.

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🔕 Ignore: Close this MR and you won't be reminded about this update again.

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