openjdk镜像依赖如下：
openjdk:8-jdk -> buildpack-deps:jessie-scm -> buildpack-deps:jessie-curl -> debian:jessie -> scratch
找到各镜像Dockerfile后即可一步步制作出openjdk:8-jdk镜像，具体步骤可参考http://www.cnblogs.com/tacyeh/p/5903982.html中制作registry方法，这里只列出所需Dockerfile路径。
https://hub.docker.com/_/openjdk/
https://hub.docker.com/_/buildpack-deps/
https://hub.docker.com/_/debian/
https://github.com/docker-library/openjdk/blob/baaaf7714f9c66e4c5decf2c108a2738b7186c7f/8-jdk/Dockerfile
https://github.com/docker-library/buildpack-deps/blob/1845b3f918f69b4c97912b0d4d68a5658458e84f/jessie/scm/Dockerfile
https://github.com/docker-library/buildpack-deps/blob/a0a59c61102e8b079d568db69368fb89421f75f2/jessie/curl/Dockerfile
https://github.com/tianon/docker-brew-debian/blob/88ae21052affd8a14553bb969f9d41c464032122/jessie/Dockerfile
https://codeload.github.com/fpco/haskell-scratch/zip/master