Dockerfile: Bump Go and Alpine versions (#42061)

packaging/docker/Dockerfile

@@ -1,4 +1,4 @@
-ARG BASE_IMAGE=alpine:3.14.2
+ARG BASE_IMAGE=alpine:3.14.3
 FROM ${BASE_IMAGE}
 
 ARG GRAFANA_TGZ="grafana-latest.linux-x64-musl.tar.gz"

packaging/docker/build.sh

@@ -60,7 +60,7 @@ docker_build () {
   if [ $UBUNTU_BASE = "0" ]; then
     libc="-musl"
     dockerfile="Dockerfile"
-    base_image="${base_arch}alpine:3.14.2"
+    base_image="${base_arch}alpine:3.14.3"
   else
     libc=""
     dockerfile="ubuntu.Dockerfile"