add launch script for ng build

Author: bcsik

.vscode/launch.json

@@ -2,6 +2,13 @@
   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
   "configurations": [
+    {
+      "name": "ng build",
+      "request": "launch",
+      "type": "chrome",
+      "preLaunchTask": "npm: build",
+      "url": "http://localhost:4200"
+    },
     {
       "name": "ng serve",
       "type": "chrome",