And a tiny shortcut

Tools/Gulp/package.json

@@ -10,7 +10,8 @@
     "license": "(Apache-2.0)",
     "scripts": {
         "install": "cd ../../ && npm install && cd Playground/ && npm install && cd ../Viewer && npm install && cd ../Tools/Gulp/",
-        "build": "gulp --max-old-space-size=8192 --tsLintFix"
+        "build": "gulp --max-old-space-size=8192 --tsLintFix",
+        "start": "gulp run --max-old-space-size=8192"
     },
     "dependencies": {
         "typescript": "^3.3.3333"