* Add CORS middleware
* API
* Add `/health` endpoint
* `lobby`
* `customWordsChance` is now an integer between `1` and `3`
* `enable_votekick` is gone
* listing lobbies (`GET /lobby`) now includes `gameState`
* Gameplay Configuration
* Lobby defaults are now configurable
* Votekicking can't be disabled anymore
* Custom word chance is now amount of custom words per turn, which is
simpler than a percentage, both in the backend and the frontend
* Server configuration
* CORS can be configured for local dev purposes and specific hosting
requirements
* Performance
* Optimise image sizes
* Use easyjson instead of encoding/json
* Better struct field alignments in some scenarios
* Frontend now uses caching and cachebusting (Loadtimes of the lobby,
even on simulated regular 2g are near instant (the load is not
perceived as such))
* Refactoring
* Remove deprecated usages of random generators
* Bugs
* Fix potential huge amount of read attempts on closed sockets on
windows
