Added a very basic how-to use this image, and a reminder to add a proper example.
Added license.md
Merge branch 'buildpack-deps_edits' of https://github.com/fredlf/docs into fredlf-buildpack-deps_edits

* 'buildpack-deps_edits' of https://github.com/fredlf/docs: (2 commits)
  Added license.md
  ...
Rename LICENSE -> license