basic server config done

.gitignore

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+node_modules

package.json

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+{
+  "name": "crud_on_subdocument_with_mongodb",
+  "version": "1.0.0",
+  "main": "index.js",
+  "author": "Babin Bohora <bohorababin1@gmail.com>",
+  "license": "MIT",
+  "type": "module",
+  "scripts": {
+    "start": "node server/index.js",
+    "dev": "nodemon server/index.js"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.0.1",
+    "express": "^4.18.1",
+    "mongoose": "^6.3.6",
+    "nodemon": "^2.0.16"
+  }
+}

server/index.js

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+import express from "express";
+import cors from 'cors';
+import 'dotenv/config';
+
+// changes port based on enviroment
+const PORT = process.env.PORT || 1234
+
+const app = express();
+// using CORS to bypass cors blocker for frontend.
+app.use(cors());
+
+
+
+
+
+
+// telling server to listen at PORT.
+app.listen(PORT, () => {
+  console.log(`SERVER ${process.env.HAPPY} starting on ${PORT}`);
+});