Add support to IPFS nodes

[aldoborrero]

In order to improve the usage of Shokku, we should add support to IPFS nodes (with a restricted set of options).

This task should be divided in smaller tasks to be better handled.

If you decide to contribute on it, just update this task to start discussion the best approach.

[blanksteer]

You want the ipfs docker image to follow the same pattern as gubiq? Alpine, python supervior and s3cfg?