Create a simple server for driving a REST endpoint

[jerold]

I'd like to allow the user to save and share boards.

• user can generate new boards, or access a list of previous boards.
• board metadata: uuid, last edit time, board state encoded as a string
• user can push edits by passing the uuid and a new board encoding

No need to do permissions or anything like that yet. If the user has the url (will include uuid) to a board, they can push edits.

[jerold]

Persistence is not my strong suite, but something I could push to AppEngine would be preferable. Possibly a Docker container to be hosted somewhere else so long as instructions are provided as part of the PR. :)