Implement Firestore content management system

[spinks]

App pages must query and dynamically create content based on Firebase:Firestore database (images, text content), bespoke per page.

The Firebase project for this app has already been created.

Resources:

• Example react implementation
  • this seems to be a good implementation to follow, if not as sophisticated as using a library
• Firestore docs
• Potentially could use this
  • reactfire
  • unfortunately does not seem as sophisticated as angularfire, or as easy to implement.

Different pages database design (and how content is created from them) must be detailed in the README

[spinks]

Commit bfc03e739fc12085f90b7a4fe5e8c9ca48258c83 on branch firestore implements this.

Documentation regarding the bespoke API in grid to be written.

Could benefit from investigation as to the number of document reads, to confirm that only one is performed (could in theory use a document reference listener as opposed to read once, assuming minimal updates to DB at peak times)

[spinks]

Closed by pull https://github.com/spinks/LioninWinterBall/pull/5