Refactor getting started chatQnA docs

[mkbhanda]

We can benefit by refactoring some docs ... of deploying ChatQnA on different hardware and CSPs. A lot of common text otherwise, and providing the same feedback across them!

For example #122 for Nvidia very similar to what we have for AIPC, #124 on IDC cloud etc.

Further, all these should recommend using containers from Docker Hub when available versus build to ease user experience.
@dbkinder @preethivenkatesh

[preethivenkatesh]

Discussed on the call for clarity, we will be working offline with the dev team to converge into 1 doc