deps(docker): bump alpine from 3.20.3 to 3.21.0

Bumps alpine from 3.20.3 to 3.21.0.

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

Signed-off-by: dependabot[bot] <[email protected]>

Dockerfile

@@ -24,7 +24,7 @@ RUN go mod download && \
 
 
 # get alpine container
-FROM alpine:3.20.3 AS app
+FROM alpine:3.21.0 AS app
 
 # create workdir
 WORKDIR /opt/app