bugfix: numWorkers() is called by the client, which does not have access to env variables, causing 'ReferenceError: process is not defined'. Long term solution, the client should not need to know how many workers there are.

src/core/configuration/PreprodConfig.ts

@@ -6,10 +6,7 @@ export const preprodConfig = new (class extends DefaultServerConfig {
     return GameEnv.Preprod;
   }
   numWorkers(): number {
-    if (process.env.SUBDOMAIN !== "main") {
-      return 2;
-    }
-    return 3;
+    return 2;
   }
   jwtAudience(): string {
     return "openfront.dev";