Cookie based auth

[joepio]

See https://github.com/atomicdata-dev/atomic-data-docs/pull/138/files#

• Create an Authentication Resource with a suiting expiration date (e.g. 1 hrs, for testing purposes even shorter)
• Sign an authentication resource (re-use the logic found in websockets.ts) on app initialization
• Set it as a cookie, make sure it expires on the same moment as the signed authentication resource. Set the Secure attribute.
• Make sure it works by creating a new Drive, uploading an Image and checking if you can view it

Of course, this also requires the back-end implementation