Add folders for the overall structure

+/node_modules
+/build
+/client/node_modules
+
+.DS_Store
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+.vscode
+
+dev.js
+./server/config/dev.js

+const express = require("express");
+const path = require("path");
+const bodyParser = require("body-parser");
+const app = express();
+
+app.use(bodyParser.urlencoded({ extended: true }));
+app.use(bodyParser.json());
+
+app.listen(port, () => {
+    console.log(`Server Running at ${port}`)
+});
+  
\ No newline at end of file

+{
+    "name": "chatbot-app",
+    "version": "1.0.0",
+    "description": "chatbot-app",
+    "main": "index.js",
+    "engines": {
+      "node": "12.16.1",
+      "npm": "6.13.4"
+    },
+    "scripts": {
+      "start": "node index.js"
+    },
+    "author": "Minjeong Seo",
+    "dependencies": {
+      "actions-on-google": "^2.6.0",
+      "body-parser": "^1.18.3",
+      "dialogflow": "^0.8.2",
+      "dialogflow-fulfillment": "^0.6.1",
+      "express": "^4.16.4"
+    }
+  }
+  
\ No newline at end of file

+if (process.env.NODE_ENV === 'production'){
+    module.exports = require('./prod');
+}else{
+    module.exports = require('./dev');
+}
\ No newline at end of file

+module.exports = {
+    googleProjectID: process.env.GOOGLE_PROJECT_ID,
+    dialogFlowSessionID: process.env.DIALOGFLOW_SESSION_ID,
+    dialogFlowSessionLanguageCode: process.env.DIALOGFLOW_LANGUAGE_CODE,
+    googleClientEmail:process.env.GOOGLE_CLIENT_EMAIL,
+    googlePrivateKey: JSON.parse(process.env.GOOGLE_PRIVATE_KEY),
+    mongoURI:process.env.MONGO_URI,
+}
\ No newline at end of file

+const express = require('express');
+const router = express.Router();
\ No newline at end of file