restore support for local dev using a non-local url

packages/frontend/vite.config.ts

@@ -3,8 +3,6 @@ import pluginReplace from '@rollup/plugin-replace';
 import pluginVue from '@vitejs/plugin-vue';
 import { type UserConfig, defineConfig } from 'vite';
 import { localesVersion } from '../../locales/version.js';
-import * as yaml from 'js-yaml';
-import { promises as fsp } from 'fs';
 
 import locales from '../../locales/index.js';
 import meta from '../../package.json';
@@ -13,9 +11,6 @@ import pluginUnwindCssModuleClassName from './lib/rollup-plugin-unwind-css-modul
 import pluginJson5 from './vite.json5.js';
 import { pluginReplaceIcons } from './vite.replaceIcons.js';
 
-const url = process.env.NODE_ENV === 'development' ? yaml.load(await fsp.readFile('../../.config/default.yml', 'utf-8')).url : null;
-const host = url ? (new URL(url)).hostname : undefined;
-
 const extensions = ['.ts', '.tsx', '.js', '.jsx', '.mjs', '.json', '.json5', '.svg', '.sass', '.scss', '.css', '.vue', '.wasm'];
 
 /**
@@ -82,7 +77,6 @@ export function getConfig(): UserConfig {
 		base: '/vite/',
 
 		server: {
-			host,
 			port: 5173,
 			hmr: {
 				// バックエンド経由での起動時、Viteは5173経由でアセットを参照していると思い込んでいるが実際は3000から配信される