ft-99: simplify setup

Author: jsajal

README.md

@@ -39,9 +39,8 @@ FlowTest has 2 major components -
 3. Install all dependencies of all modules:
     ```bash
     npm install
-    cd server && npm install
     ```
-4. Rename .env.example to .env and enter your cerdentials, for instance
+4. Rename `.env.example` to `.env` and enter your cerdentials, for instance
     ```bash
     OPENAI_API_KEY={API_KEY_VALUE}
     PORT=3500

package.json

@@ -27,7 +27,8 @@
     "start": "npm run build && cd server && npm start",
     "build": "react-scripts build",
     "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "postinstall": "cd server && npm install"
   },
   "eslintConfig": {
     "extends": [