chore: update alpine base images

[SuperSandro2000]

Description

alpine 3.18.0 contains a CVE which is fixed in 3.18.2. It would also be a possibility to only pin alpine:3.18.

 ▶ trivy image --scanners vuln alpine:3.18.0
2023-06-26T11:18:23.089+0200    INFO    Vulnerability scanning is enabled
2023-06-26T11:18:24.579+0200    INFO    Detected OS: alpine
2023-06-26T11:18:24.579+0200    INFO    Detecting Alpine vulnerabilities...
2023-06-26T11:18:24.581+0200    INFO    Number of language-specific files: 0

alpine:3.18.0 (alpine 3.18.0)

Total: 2 (UNKNOWN: 0, LOW: 0, MEDIUM: 0, HIGH: 2, CRITICAL: 0)

┌────────────┬───────────────┬──────────┬───────────────────┬───────────────┬───────────────────────────────────────────────────┐
│  Library   │ Vulnerability │ Severity │ Installed Version │ Fixed Version │                       Title                       │
├────────────┼───────────────┼──────────┼───────────────────┼───────────────┼───────────────────────────────────────────────────┤
│ libcrypto3 │ CVE-2023-2650 │ HIGH     │ 3.1.0-r4          │ 3.1.1-r0      │ Possible DoS translating ASN.1 object identifiers │
│            │               │          │                   │               │ https://avd.aquasec.com/nvd/cve-2023-2650         │
├────────────┤               │          │                   │               │                                                   │
│ libssl3    │               │          │                   │               │                                                   │
│            │               │          │                   │               │                                                   │
└────────────┴───────────────┴──────────┴───────────────────┴───────────────┴───────────────────────────────────────────────────┘

Related issues

Related PRs

• #XXX
• #YYY

Remove this section if you don't have related PRs.

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}