Update alpine Docker tag to v3.21.2 (#127)

renovate[bot] · web-flow · commit 3e6e5c1994d2 · 2025-01-17T08:20:22.000+01:00
Co-authored-by: renovate[bot] &lt;29139614+renovate[bot]@users.noreply.github.com&gt;
diff --git a/Dockerfile b/Dockerfile
@@ -1,5 +1,5 @@
 FROM cloudflare/cloudflared:2024.12.2 as cloudflared
-FROM alpine:3.21.0
+FROM alpine:3.21.2
 
 RUN apk add jq~=1.7 --no-cache
 
