Add vscode debug config, update readme (vercel#2181)

.vscode/launch.json

@@ -0,0 +1,13 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Hyper",
+      "runtimeExecutable": "${workspaceRoot}/node_modules/.bin/electron",
+      "program": "${workspaceRoot}/app/index.js",
+      "protocol": "inspector"
+    }
+  ]
+}

readme.md

@@ -37,8 +37,10 @@ choco install hyper
 2. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device
 3. Install the dependencies: `yarn`
 4. Build the code and watch for changes: `yarn run dev`
-5. In another terminal tab/window/pane, run the app: `yarn run app`
-
+5. To run `hyper`
+  * `yarn run app` from another terminal tab/window/pane
+  * If you are using **Visual Studio Code**, select `Launch Hyper` in debugger configuration to launch a new Hyper instance with debugger attached. 
+
 To make sure that your code works in the finished application, you can generate the binaries like this:
 
 ```bash