Since docker is a very popular platform as to PaaS, it should be benefit for mongodb to release it's source code with Dockerfile(and the scripts to build docker image if there's any). Here, I would like to raise this idea to include it into our source tree:
1) I suggest to have a dir named Docker with Dockerfile and other related scripts under it. This dir will just be put under the root dir (the same level with debian or rpm dir)
2) The Dockerfile should build docker image based on the latest development code
3) The Dockerfile should be able to build docker image for most important platforms including X86, Power and others.