server root path

server/app.js

-import express from 'express'
-import cookieParser from 'cookie-parser'
-import mainRouter from './routes/index.js'
+import express from "express";
+import path from "path";
+import cookieParser from "cookie-parser";
+import mainRouter from "./routes/index.js";
 
-const app = express()
+// 배포용?
+const isProduction = process.env.NODE_ENV === "production";
+let root_url = "/";
+if (isProduction) {
+  root_url = "/app/todayku";
+}
+const CURRENT_WORKING_DIR = process.cwd();
 
-app.use(express.json())
-app.use(express.urlencoded({ extended: true }))
-app.use(cookieParser())
-app.use('/api', mainRouter)
+const app = express();
 
-export default app
+app.use(
\ No newline at end of file
+  path.join(root_url, "/"),
+  express.static(path.join(CURRENT_WORKING_DIR, "client", "build"))
+);
+
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
+app.use(cookieParser());
+app.use(path.join(root_url, "/api"), mainRouter);
+
+export default app;