osbuilder: apk add --no-cache
Hadolint DL3019. If you're wondering why this is in this PR, that's
because I touch the file later, and we're only triggering the lints for
changed files.
ARG IMAGE_REGISTRY=docker.io
FROM ${IMAGE_REGISTRY}/alpine:3.15
-RUN apk update && apk add \
+RUN apk update && apk add --no-cache \
apk-tools-static \
autoconf \
automake \
