fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7413532
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7413532
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7895537
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7895537
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-8235201

Dockerfile

@@ -23,7 +23,7 @@ RUN /build/scripts/deps.sh
 
 RUN make plugin_versioned.yaml all -j4
 
-FROM alpine:3.20.1
+FROM alpine:3.21.2
 ENV LOVELY_HELM_PATH=/usr/local/bin/helm
 ENV LOVELY_HELMFILE_PATH=/usr/local/bin/helmfile
 ENV LOVELY_KUSTOMIZE_PATH=/usr/local/bin/kustomize