Merge pull request #39 from acorn-io/renovate/alpine-3.x

Update alpine Docker tag to v3.16.2

Author: cjellick

Dockerfile

@@ -6,7 +6,7 @@ ENV CGO_ENABLED=0
 RUN --mount=type=cache,target=/go/pkg --mount=type=cache,target=/root/.cache/go-build \
     go build -o bin/acorn-dns -ldflags "-s -w -X 'github.com/acorn-io/acorn-dns/pkg/version.Tag=${TAG}'" .
 
-FROM alpine:3.16.1 AS base
+FROM alpine:3.16.2 AS base
 RUN apk add --no-cache ca-certificates 
 RUN adduser -D acorn
 # USER acorn commented out so that i can easily get into the container and do stuff to it