Fix types for vite dev server

Author: bebeal

server.ts

@@ -9,7 +9,7 @@ import api from './api/api.js';
 const __dirname: string = path.dirname(fileURLToPath(import.meta.url));
 const PORT = parseFloat(process.env.PORT || '5137');
 
-export const createServer = async (root = process.cwd(), env = process.env.NODE_ENV) => {
+export const createServer = async (root = process.cwd(), env = process.env.NODE_ENV): Promise<{ expressServer: express.Express; viteServer: ViteDevServer | null }> => {
   const isProd = env === 'production';
   const isTest = process.env.VITEST;