Squashed 'docs_source/' changes from df4f873..7048689

7048689 Add docs for ec2, ci and todos.

git-subtree-dir: docs_source
git-subtree-split: 7048689a284e9fe785e017b25ae8cd9b3aa22ba6
Merge commit 'e0815ad3f5da557ed5202cb5f9776b4cdcc45c90'
Updated docs.