Improve the new site template about tux

[eirikurn]

We're moving the admin logic (and contentful config) into a tux addon. The site template will be updated to match. We're also finally working on more documentation that can be added to the readme.

[benediktvaldez]

The start script should also look like this, since HTTPS is required for contentful login, and port 3000 is assumed in new's app.js

"start": "PORT=3000 HTTPS=true tux-scripts start",

If #113 gets merged, we could even skip the PORT var

"start": "HTTPS=true tux-scripts start",

[thorsteinsson]

In Ember they have a welcome page component and a package. Might be nice to do it that way so it's easy to remove and we can show guides with the next steps on the page itself.

[benediktvaldez]

I agree @thorsteinsson – same with storybook, you always get a 'Welcome' story that explains how stuff works and a 'Button' story as a secondary example.

[eirikurn]

This is completely different and better in v0.4 (no admin stuff by default). We'll look into creating a better admin template later.