Bump alpine from 3.22 to 3.23 in /docker

Bumps alpine from 3.22 to 3.23.

---
updated-dependencies:
- dependency-name: alpine
  dependency-version: '3.23'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docker/Dockerfile

@@ -1,6 +1,6 @@
 # first, let's build the software
 # this is going to take the most time
-FROM alpine:3.22 AS builder
+FROM alpine:3.23 AS builder
 
 LABEL org.opencontainers.image.source = "https://github.com/blue-nebula/base"
 
@@ -36,7 +36,7 @@ RUN python3 /generate-servinit-template.py /servinit.cfg > /servinit.tmpl
 
 
 # finally, let's build the final runtime image (doesn't need all of the build dependencies)
-FROM alpine:3.22
+FROM alpine:3.23
 
 LABEL maintainer="https://blue-nebula.org"