add docker image search api

Signed-off-by: soulseen <sunzhu@yunify.com>

vendor/github.com/docker/distribution/Dockerfile

@@ -0,0 +1,23 @@
+FROM golang:1.11-alpine AS build
+
+ENV DISTRIBUTION_DIR /go/src/github.com/docker/distribution
+ENV DOCKER_BUILDTAGS include_oss include_gcs
+
+ARG GOOS=linux
+ARG GOARCH=amd64
+ARG GOARM=6
+
+RUN set -ex \
+    && apk add --no-cache make git file
+
+WORKDIR $DISTRIBUTION_DIR
+COPY . $DISTRIBUTION_DIR
+RUN CGO_ENABLED=0 make PREFIX=/go clean binaries && file ./bin/registry | grep "statically linked"
+
+FROM alpine
+COPY cmd/registry/config-dev.yml /etc/docker/registry/config.yml
+COPY --from=build /go/src/github.com/docker/distribution/bin/registry /bin/registry
+VOLUME ["/var/lib/registry"]
+EXPOSE 5000
+ENTRYPOINT ["registry"]
+CMD ["serve", "/etc/docker/registry/config.yml"]