Added Debug configuration for VSCode

[oskardudycz]

To configure VSCode debug you need to add launch.json file in the .vscode folder.

To not need to synchronise two separate configurations, we'll reuse the existing NPM script dev:start that starts the application.

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Debug",
      "type": "node",
      "request": "launch",
      "runtimeExecutable": "npm",
      "runtimeArgs": ["run-script", "dev:start", "--", "--inspect-brk=9229"],
      "port": 9229
    }
  ]
}

As we have TypeScript configured, then we don't need any additional setup. We're reusing the native node debugging capabilities by using the --inspect-brk=9229 parameter. Read more in the Node.js documentation