There were several issues with the example [examples/with-firebase-hosting-and-typescript](https://github.com/zeit/next.js/tree/canary/examples/with-firebase-hosting-and-typescript)
* `npm run serve`
* Has no `pre` task that actually builds the app. Requires manual running of all build scripts.
* Will choke on windows because trying to set environment variables with `NODE_ENV=production`
* Outdated Typescript and Tslint
* Not being able to deploy because `firebase-tools` being of a deprecated version.
* Structure, which I understand is based on `firebase-tools` generation, is confising with `src/functions/src` being generally bad structuring.
I remedied this and also improved some other factors:
* Remove dependency `prettier` as it is unused (f4d6f54)
* Upgrade all dependencies (09a9193)
* Use upgraded firebase dependencies to deploy to node 8 environment (87e1e09, 7d8055b)
* Remove deprecated tslint rule `no-unused-variable` (9392162)
* Flattened filestructure in `src/functions` (097a25a)
* Use ES import when importing next (6c99adb)
* Fixed incorrect name and added somewhat to the description in package.json.
`with-firebase-hosting` → `with-firebase-hosting-and-typescript` (1ffa0b5)
* Fixed `serve` script by building before running, using [`cross-env`](https://www.npmjs.com/package/cross-env) to set environment variables and remove unecessary flag. (3a1e221, 422ccee, 8811e44)
* Add `.firebase` cache to `.gitignore` (4d7cbe4)
* Add `-C` (clean) flag when copying dependency files `copy-deps` (0826708)
* Use `strict: true` in the functions tsconfig (229b04f)
This was tested by running serve on windows and linx(WSL) and deploy on linux(WSL)
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This is based on #5819 but correctly based from `canary`
Adds an example based off of @jthegedus work on firebase hosting, compatible with next v6 and using typescript in both the firebase functions and the next app.
