chore(deps): update alpine docker tag to v3.18

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
alpine	final	minor	3.15 -> 3.18
alpine	final	minor	3.17 -> 3.18
alpine	stage	minor	3.17 -> 3.18

---

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 these updates again.

---

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

---

This PR has been generated by Mend Renovate. View repository job log here.

[renovate]

Renovate Ignore Notification

Because you closed this PR without merging, Renovate will ignore this update (3.18). You will get a PR once a newer version is released. To ignore this dependency forever, add it to the ignoreDeps array of your Renovate config.

If you accidentally closed this PR, or if you changed your mind: rename this PR to get a fresh replacement PR.