Use stencil custom request listener for /api/graphql

[mattvb91]

In the next version of Stencil we can make use of a new requestListenerPath option in stencil config.

ionic-team/stencil@eec7651

That means we can run our /api/graphql endpoint on the same port meaning we can throw out a few things

• Add request listener that serves our graphql API
• clean up Access-Control-Allow-Origin header in packages/auth/server/resolvers/Auth.ts
• Adjust .env.sample in cli template & all packages.
• update packages/core-components/app/store/core.ts httpLink to reflect new change for SSG

[mattvb91]

https://github.com/ionic-team/stencil/releases/tag/v2.5.0

Has been released