refactor: node js debugging - launch.json

- Remove source path mapping
- Add a note for the localRoot being based on the where the function
  code resides. This is referenced by CodeUri inside template.yaml
- Add a note on where VS code needs to be opened.

docs/usage.rst

@@ -304,33 +304,39 @@ Visual Studio Code:
    SAM Local debugging example
 
 In order to setup Visual Studio Code for debugging with AWS SAM CLI, use
-the following launch configuration:
+the following launch configuration after setting directory where the template.yaml is present
+as workspace root in Visual Studio Code:
 
 .. code:: json
 
-	{
-		"version": "0.2.0",
-		"configurations": [{
-	        "name": "Attach to SAM CLI",
-	        "type": "node",
-	        "request": "attach",
-	        "address": "localhost",
-	        "port": 5858,
-	        "localRoot": "${workspaceRoot}",
-	        "sourceMapPathOverrides": {
-	            "${workspaceRoot}/runtime": "${remoteRoot}"
-			    },
-	        "remoteRoot": "/var/task",
-	        "protocol": "inspector",
-	        "stopOnEntry": false
-		}]
-	}
+  {
+       "version": "0.2.0",
+       "configurations": [
+           {
+               "name": "Attach to SAM CLI",
+               "type": "node",
+               "request": "attach",
+               "address": "localhost",
+               "port": 5858,
+               // From the sam init example, it would be "${workspaceRoot}/hello_world"
+               "localRoot": "${workspaceRoot}/{directory of node app}",
+               "remoteRoot": "/var/task",
+               "protocol": "inspector",
+               "stopOnEntry": false
+           }
+       ]
+   }
+
+Note: localRoot is set based on what the CodeUri points at template.yaml,
+if there are nested directories within the CodeUri, that needs to be
+reflected in localRoot.
 
 Note: Node.js versions --below-- 7 (e.g. Node.js 4.3 and Node.js 6.10)
 use the ``legacy`` protocol, while Node.js versions including and above
 7 (e.g. Node.js 8.10) use the ``inspector`` protocol. Be sure to specify
 the corresponding protocol in the ``protocol`` entry of your launch
-configuration.
+configuration. This was tested with VS code version 1.26, 1.27 and 1.28
+for ``legacy`` and ``inspector`` protocol.
 
 Debugging Python functions
 --------------------------