[2378] Accessing the current domain name client side and in SSR, consistently?

Hi there. I've just started a new app that runs with a wildcard subdomain. So, I'm going to be rendering foo.com, bar.foo.com, and many many other subdomains pointing to the same nuxt.js server instance.

I'm looking for a way for my most root-y of pages, index.vue, to be able to distinguish if it's running on the main domain foo.com, or if it's on one of our zillions of subdomains.

I understand that created is the best lifecycle event to grab this info, but obviously window.location only exists on the client side. I cannot, for the life of me, figure out how I might distinguish what domain name was used when the page is rendered on the Server Side.

I've poked around at process, but I'm not sure what the right place is.

So, basically:

    created () {
      if (process.browser) {
        console.log(window.location)
      } else {
        console.log('*****')
        // console.log(something_something_something)
        console.log('*****')
      }
    }

and this is where I'm stuck. Help most welcome—I've gone through the docs and searched all open and closed issues (but it's possible I didn't use the right search terms).