feat: configure vite build options

frontend/vite.config.ts

@@ -1,5 +1,5 @@
-import { defineConfig } from 'vite';
-import react from '@vitejs/plugin-react';
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
 
 export default defineConfig({
   plugins: [react()],
@@ -7,6 +7,16 @@ export default defineConfig({
     port: 3000,
   },
   build: {
-    outDir: 'dist',
+    outDir: "dist",
+    // distフォルダにビルドされるので、distをベースパスにする
+    assetsDir: '',
+    // dist配信を前提にパスを調整
+    rollupOptions: {
+      output: {
+        entryFileNames: `assets/[name].js`,
+        chunkFileNames: `assets/[name].js`,
+        assetFileNames: `assets/[name].[ext]`,
+      },
+    },
   },
 });