FROM alpine:3.15

RUN apk add --no-cache ca-certificates

RUN set -eux; \
# https://github.com/distribution/distribution/releases
	version='2.8.0'; \
	apkArch="$(apk --print-arch)"; \
	case "$apkArch" in \
		x86_64)  arch='amd64';   sha256='7b2ebc3d67e21987b741137dc230d0f038b362ba21e02f226150ff5577f92556' ;; \
		aarch64) arch='arm64';   sha256='16b9f497751bd3abe8b75d0f1538e2767ef3c536f4f11d05a312fb1767d43e85' ;; \
		armhf)   arch='armv6';   sha256='5021831ba045a3cc409f6f62ab50c04db2c935a058eb53ce9d74a4dd5ba41102' ;; \
		armv7)   arch='armv7';   sha256='ff659c577266662edb247d4719399fa1179bfcb90fb6006fc63396b7089c0f70' ;; \
		ppc64le) arch='ppc64le'; sha256='46fbd645b415c68222ee0e8043a91c27b6bb2ec2e0a568f663d1e78cc69d8cda' ;; \
		s390x)   arch='s390x';   sha256='ebbd08228cf290ceef50ab542ae6087b66173b18fa84868210cbbdb458d11bd3' ;; \
		*) echo >&2 "error: unsupported architecture: $apkArch"; exit 1 ;; \
	esac; \
	wget -O registry.tar.gz "https://github.com/distribution/distribution/releases/download/v${version}/registry_${version}_linux_${arch}.tar.gz"; \
	echo "$sha256 *registry.tar.gz" | sha256sum -c -; \
	tar --extract --verbose --file registry.tar.gz --directory /bin/ registry; \
	rm registry.tar.gz; \
	registry --version

COPY ./config-example.yml /etc/docker/registry/config.yml

VOLUME ["/var/lib/registry"]
EXPOSE 5000

COPY docker-entrypoint.sh /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

CMD ["/etc/docker/registry/config.yml"]