Revert "update lession content"

This reverts commit 2219faaef163b8dbb8c5288ee975d211749220ae.
Revert "Revert "update lession content""

This reverts commit a6dfb19f429076a18d4c9fd96be838a308d94620.
Merge branch 'master' of https://github.com/tongda/tw_devops_workshop
Merge branch 'master' of https://github.com/tongda/tw_devops_workshop
add basic framework for ansible