Future request: add step to run "npm install" similar to webpack template

[dima74]

When you create project with webpack template, then at one of steps it offers install packages via npm install:

? Should we run `npm install` for you after the project has been created? (recommended) (Use arrow keys)
❯ Yes, use NPM 
  Yes, use Yarn 
  No, I will handle that myself

Please, add the same step to webpack-simple template.