Add documentation for versions 1.7.x and older

[rogeralmeida]

There is no documentation about the inputs for the versions 1.7.x and older.
As we have deployed this stack on older versions it would be awesome if we could check the documentation to see what are the inputs of the versions above the current version.
If we are not supposed to used some of the older versions because of bugs or problems then it would be interesting to mark them as deprecated somehow.