* Improve typing of client CORS helper
* Take node-fetch as a dependency
* Add explicit Firebase region into config
* Add new Vercel proxy API routes that talk to backend
* Call Vercel proxy routes from `api-call` module
* Tweak import to try to get Vercel happy
* Tidy up a tiny bit
* Add dev target for TheoremOne
* Restrict signups to theoremone.co emails
* Add new indices
* Forbid reads from unauthenticated users
* Client-side render pages that need auth
These pages are now client-side rendered:
- /home
- /leaderboards
- /market/...
- /fold/...
* Hide 404 for private Manifolds
* Brand instance for TheoremOne
* Hide "Add Funds" and "Personalize your feed"
* "M$" => "T$"
* Hide Discord & About Page too
* Update placeholders for teams
* Update firestore.indexes.json
* Switch /analytics to propz
* Migrate per-env code into common/
* More migrations to PROJECT_ID
* Conditionally use SSG depending on public vs private instance
* Fix props to be empty object
* Move more logic into access
* Spin out config files for each environment
* Generify most of the customizable brand stuff
* Move IS_PRIVATE_MANIFOLD to access.ts
* Rename access.ts to envs/constants.ts
* Add "dev:dev" alias
* Rever firestore rules to existing settings
* Fixes according to James's review
