Add `portal.json` to `.gitignore`

[lsjroberts]

When I pull your changes it causes conflicts with the ones I'm making. It would be good to add a .gitignore with:

portal.json

And then instead of modifying it in a few steps for new users onboarding, it could auto create a blank one if it does not exist. Perhaps with some default values like:

{
  "name": "new_user",
  "desc": "",
  "site": "",
  "dat": "",
  "port": [
     // maybe even some starting feeds here too?
  ]
}

Though this sort of thing does sound like it'll be improved by the App Scheme idea.

Either way, I'll pop up a PR with this shortly.

[neauoire]

Yes! haha I've been wondering how to do this. It's a bit strange that everyone has my feed by default..