chore(deps): update alpine docker tag to v3.21 (#77)

renovate[bot] · web-flow · commit 6b26032b0885 · 2024-12-06T00:33:12.000Z
Co-authored-by: renovate[bot] &lt;29139614+renovate[bot]@users.noreply.github.com&gt;
diff --git a/Dockerfile b/Dockerfile
@@ -1,5 +1,5 @@
 ARG GO_VERSION=1.22-alpine3.18
-ARG FROM_IMAGE=alpine:3.20
+ARG FROM_IMAGE=alpine:3.21
 
 FROM golang:${GO_VERSION} AS builder
 
