Client JWT authentication (#723)

## Description:

Send JWT to the game server for verification.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [ ] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

src/core/configuration/ProdConfig.ts

@@ -8,7 +8,7 @@ export const prodConfig = new (class extends DefaultServerConfig {
   env(): GameEnv {
     return GameEnv.Prod;
   }
-  discordRedirectURI(): string {
-    return "https://openfront.io/auth/callback";
+  jwtAudience(): string {
+    return "openfront.io";
   }
 })();