Bump alpine from 3.18.5 to 3.19.1

Bumps alpine from 3.18.5 to 3.19.1.

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

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

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.18.5
+FROM alpine:3.19.1
 MAINTAINER Dr Internet <internet@limelightgaming.net>
 
 # Install RSync and Open SSH.