feat: Update dependencies and add new voice

- Updates project dependencies to latest versions for improved performance and security.
- Adds a new voice option, 'Aoede', to the available voices.
- Modifies the voice change handler to force re-generation of future audio segments for the selected article.
- Updates Vite configuration to align with newer Vite versions and load environment variables correctly.
- Adjusts TypeScript configuration for a more modern setup.
- Removes unnecessary configuration from Nginx file.

vite.config.ts

@@ -1,23 +1,16 @@
-import path from 'path';
 import { defineConfig, loadEnv } from 'vite';
 import react from '@vitejs/plugin-react';
 
 export default defineConfig(({ mode }) => {
-    const env = loadEnv(mode, '.', '');
-    return {
-      server: {
-        port: 3000,
-        host: '0.0.0.0',
-      },
-      plugins: [react()],
-      define: {
-        'process.env.API_KEY': JSON.stringify(env.GEMINI_API_KEY),
-        'process.env.GEMINI_API_KEY': JSON.stringify(env.GEMINI_API_KEY)
-      },
-      resolve: {
-        alias: {
-          '@': path.resolve(__dirname, '.'),
-        }
-      }
-    };
-});
+  // Load env file based on `mode` in the current working directory.
+  const env = loadEnv(mode, (process as any).cwd(), '');
+  
+  return {
+    plugins: [react()],
+    define: {
+      // This allows the app code to continue using process.env.API_KEY
+      // even though it is running in the browser.
+      'process.env.API_KEY': JSON.stringify(env.API_KEY)
+    }
+  };
+});