Updated Contributing.md.

CONTRIBUTING.md

@@ -1,15 +1,28 @@
 ## For Contributors:
 
-In your local clone, create a ```.env``` file and add:
+In your local clone, create a `.env` file and add:
 
 ```bash
 GITHUB_TOKEN = <github access token>
 ```
+
 Run the following commands:
+
 ```bash
 npm install
+npm link
 ```
+
 Add CLI arguments as needed (see [Usage](#usage))
+
+```bash
+node .
+```
+
+Navigate to another repository on your computer, and run:
+
 ```bash
-node . 
-```
+can-merge
+```
+
+You should be able to drop into the CLI, generate a token, and play around in the can-merge interface.