Initialize full project environment: React, Redux, Express, MongoDB

README.md

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+[![Review Assignment Due Date](https://classroom.github.com/assets/deadline-readme-button-22041afd0340ce965d47ae6ef1cefeee28c7c493a6346c4f15d667ab976d596c.svg)](https://classroom.github.com/a/QUdQy4ix)
 # CS3219 Project (PeerPrep) - AY2526S1
-## Group: Gxx
+## Group: G14
 
 ### Note: 
 - You are required to develop individual microservices within separate folders within this repository.
-- The teaching team should be given access to the repositories as we may require viewing the history of the repository in case of any disputes or disagreements. 
+- The teaching team should be given access to the repositories as we may require viewing the history of the repository in case of any disputes or disagreements.
+
+### Running the app
+#### Frontend 
+1. Switch to `frontend` directory.
+    ```
+    cd frontend
+    ```
+2. Install dependencies.
+    ```
+    npm install
+    ```
+3. Start the app locally.
+    ```
+    npm start
+    ```
+
+#### Backend

backend/.gitignore

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+# Node modules
+node_modules/
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Build / output folders
+dist/
+build/
+
+# Temporary files
+tmp/
+temp/
+
+# MongoDB local storage (optional, if using local db files)
+data/
+
+# IDE / editor files
+.vscode/
+.idea/
+
+# Coverage reports
+coverage/

backend/controller/user.js

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+const User = require('../model/user');
+
+const getUsernames = async (req, res) => {
+  try {
+    const users = await User.find();
+    res.status(200).json({ success: true, payload: users });
+  } catch (error) {
+    console.error(error);
+    res.status(500).json({ success: false, error: 'Server Error' });
+  }
+};
+
+const postUsername = async (req, res) => {
+  try {
+    const user = await User.create(req.body);
+    res.status(201).json({ success: true, payload: user });
+  } catch (error) {
+    console.error(error);
+    res.status(500).json({ success: false, error: 'Server Error' });
+  }
+};
+
+module.exports = { getUsernames, postUsername };

backend/model/user.js

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+const mongoose = require("mongoose");
+
+const userSchema = new mongoose.Schema(
+  {
+    username: {
+      type: String,
+      required: true,
+    }
+  },
+  { timestamps: true, collection: 'user' }
+);
+
+module.exports = mongoose.model("user", userSchema);