Update alpine Docker tag to v3.21.0

renovate[bot] · web-flow · commit 65205bcec618 · 2024-12-06T00:54:40.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -33,7 +33,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -o cloudprober -ldflags "-X main.version=$
 
 RUN ./cloudprober -version
 
-FROM alpine:3.19.0
+FROM alpine:3.21.0
 
 RUN mkdir -p /app/bin
 
