Typos

"need scale you app" -> "need to scale your app"
"into cloud (several servers)" -> "into several cloud servers,"  # Phrasing. 
"No need 10 times install a same software" -> "No need to install the same software 10 times"
"server" -> "the server"
"create new node" -> "create a new node"
"have configured instance" -> "[a] configured [the] instance"  # Could be either - chose the.
"You Chef is also documentation" -> "Chef is also documentation"
"Chef recipes contain all information about your environment" -> "Chef recipes contain all the configuration information for your environment"

"Undoing concept" -> Not clear, I'm afraid. Meaning "won't rollback changes"?