add instructions for re-use when projects are differently named

[bvreede]

When re-using this project (thanks!!), I came across an issue:

my project has a different name. I had to add this name to nuxt-config.js, in order to get the deployment in the correct location:

  router: {
    base: '/{my-project-name}/',
    middleware: 'storyboards-dynamic-routes'
  },

It would be nice to add this instruction to the README?

Thanks again!