[Docs] Description of intallation

@@ -31,20 +31,36 @@
 
 ## Getting Started (Installation)
 
-### Install
-
-```sh
+### Set up
+```bash
+git clone http://khuhub.khu.ac.kr/2021105636/Extended-Calendar.git
 npm install
-npm -g install nodemon
+npm install -g nodemon
+npm install -g pm2
 ```
 
-### Build & Run
-
-```sh
+### Run to debug
+> Terminal 1 ( Server )
+>
+> ```
+> npm run server
+> ```
+>
+> Terminal 2 ( React )
+>
+> ```
+> npm start
+> ```
+
+port : 3000
+<br>
+### Run to deploy
+```
 npm run build
-npm run server
+npm run pm2
 ```
-
+port : 3001
+<br>
 <br>
 
 ## Usage