Bump alpine from 3.18.3 to 3.18.4 (#218)

Bumps alpine from 3.18.3 to 3.18.4.

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -22,7 +22,7 @@ COPY lib lib
 RUN mix do compile, release
 
 # prepare release image
-FROM alpine:3.18.3 AS app
+FROM alpine:3.18.4 AS app
 RUN apk add --no-cache openssl ncurses-libs
 WORKDIR /app
 RUN chown nobody:nobody /app