server esm 모듈 형식으로 변경

package.json

@@ -9,7 +9,7 @@
     "dist"
   ],
   "scripts": {
-    "test:server": "node ./test/server.cjs",
+    "test:server": "node test/server.js",
     "test:client": "node bin/test.client.cjs",
     "test:client:headless": "node bin/test.client.cjs --headless",
     "build": "node ./bin/build.cjs"

test/server.cjs → test/server.js

@@ -1,10 +1,17 @@
-const path = require("path");
-const express = require("express");
-const webpack = require("webpack");
-const middleware = require("webpack-dev-middleware");
-const yargs = require("yargs");
+import express from "express";
+import path from "path";
+import url from "url";
+import webpack from "webpack";
+import middleware from "webpack-dev-middleware";
+import yargs from "yargs";
+import { hideBin } from "yargs/helpers";
 
-const argv = yargs.alias("p", "port").default("port", "8080").parse();
+const __dirname = path.dirname(url.fileURLToPath(import.meta.url));
+
+const argv = yargs(hideBin(process.argv))
+  .alias("p", "port")
+  .default("port", "8080")
+  .parse();
 const port = parseInt(argv.port, 10);
 
 const app = express();