# See https://medium.com/on-docker/use-multi-stage-builds-to-inject-ca-certs-ad1e8f01de1b ARG certs_image=non-existing ARG root_image==non-existing FROM $certs_image AS certs RUN apk update && apk upgrade && apk --update --no-cache add ca-certificates FROM $root_image COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt