Update alpine Docker tag to v3.21

renovate[bot] · web-flow · commit 3571d36ed1d0 · 2024-12-06T00:13:48.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -34,7 +34,7 @@ RUN mkdir /tmp/kubesec \
   && tar -xzf /tmp/kubesec/kubesec.tar.gz -C /tmp/kubesec \
   && chmod +x /tmp/kubesec/kubesec
 
-FROM alpine:3.16
+FROM alpine:3.21
 
 WORKDIR /src
 
