Fixing a cd command in getting started (hyperledger-archives#997)

* tweaks to the Playground local install instructions

* Additional formatting tweaks to playground local install instructions.  Added section explaining how to acivate the hlfabric profile.

* Fixing link to be localhost for the local install istructions

* Add CLI way of grabbing docker compose yml file"

* homepage changes

packages/composer-website/jekylldocs/tutorials/getting-started-cmd-line.md

@@ -71,7 +71,7 @@ First clone the repository that contains the Business Network Definition (note t
 
 ```bash
 $ git clone https://github.com/hyperledger/composer-sample-networks.git
-$ cd sample-networks/packages/DigitalProperty-Network
+$ cd composer-sample-networks/packages/DigitalProperty-Network
 $ npm install
 ```