Remove HTTPS configuration from vite.config.ts

Removed HTTPS configuration from Vite server settings.

frontend/vite.config.ts

@@ -1,14 +1,9 @@
 import { defineConfig } from 'vite';
 import react from '@vitejs/plugin-react-swc';
-import fs from 'fs';
 
 export default defineConfig({
   plugins: [react()],
   server: {
-    https: {
-      key: fs.readFileSync('./key.pem'),
-      cert: fs.readFileSync('./cert.pem')
-    },
     proxy: {
       '/api': {
         target: 'http://localhost:8080',