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
  ...

buildpack-deps/LICENSE.md

@@ -0,0 +1,2 @@
+View [license information](https://www.debian.org/social_contract#guidelines)
+for the software contained in this image.

buildpack-deps/README-content.md

@@ -6,3 +6,9 @@ includes a large number of "development header" packages needed by various
 things like Ruby Gems, PyPI modules, etc. For example, `buildpack-deps` would
 let you do a `bundle install` in an arbitrary application directory without
 knowing beforehand that `ssl.h` is required to build a dependent module.
+
+# How to use this image
+
+This stack is designed to be the foundation of a language-stack image.
+
+<!-- TODO: add an example -->