fix(command:init): dev command for Next.Js projects

[glaucia86]

Pull Request related with #553

Results

I made some screenshots to show that it is working now. To reproduce, follow the steps below:

1 - Create any Next.Js project. Eg

npx create-next-app --example hello-world hello-world-app

2 - Now run the command

swa init

After to execute the command it will generate a file swa-cli.config with the configuration

{
  "$schema": "https://aka.ms/azure/static-web-apps-cli/schema",
  "configurations": {
    "hello-world-app-glau": {
      "appLocation": ".",
      "outputLocation": ".next",
      "appBuildCommand": "npm run build",
      "run": "npm run dev",
      "appDevserverUrl": "http://localhost:3000"
    }
  }
}

4 - Now execute the command

swa start

And open a browser on port localhost:4280. If you see the message: 'Hello World' it is because it's working perfectly.

[sgollapudi77]

@all-contributors add @glaucia86 code

[allcontributors]

@sgollapudi77

I've put up a pull request to add @glaucia86! 🎉

[sgollapudi77]

Closes #553

[glaucia86]

Thanks a lot, @sgollapudi77 @manekinekko and @Reshmi-Sriram