Update alpine Docker tag to v3.20

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
alpine	final	minor	3.18 -> 3.20

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.53%. Comparing base (e33f870) to head (4d6bb39).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #54   +/-   ##
=======================================
  Coverage   75.53%   75.53%           
=======================================
  Files           6        6           
  Lines         278      278           
=======================================
  Hits          210      210           
  Misses         50       50           
  Partials       18       18           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.