chore(deps): update alpine docker tag to v3.21

renovate[bot] · web-flow · commit 3bdbdc790363 · 2024-12-06T02:00:19.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -16,7 +16,7 @@ COPY . .
 
 RUN CGO_ENABLED=0 go build -o webhook -ldflags '-w -extldflags "-static"' .
 
-FROM alpine:3.12
+FROM alpine:3.21
 
 RUN apk add --no-cache ca-certificates
 
