Relocate code into src folder

src/jsconfig.json

@@ -0,0 +1,12 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "lib": [
+            "es6"
+        ]
+    },
+    "exclude": [
+        "node_modules"
+    ]
+}