major update, trying new deployment

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
+.DS_Store
+
+#Excluding build directory
+public/
+
+.env 
+.env.test

backend/app.js

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+const express = require('express');
+const morgan = require('morgan');
+const cors = require('cors');
+const { swaggerUi, specs } = require('./swagger');
+
+const app = express();
+
+// Middleware
+app.use(express.json());
+app.use(cors());
+app.use(morgan('dev'));
+
+// Routes
+const userRoutes = require('./routes/userRoutes');
+const expenseRoutes = require('./routes/expenseRoutes');
+const incomeRoutes = require('./routes/incomeRoutes');
+const budgetRoutes = require('./routes/budgetRoutes');
+app.use('/api/users', userRoutes);
+app.use('/api/expense', expenseRoutes);
+app.use('/api/income', incomeRoutes);
+app.use('/api/budget', budgetRoutes);
+
+// Swagger docs
+app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(specs));
+
+// Error Handling Middleware
+const { notFound, errorHandler } = require('./middleware/errorMiddleware');
+app.use(notFound);
+app.use(errorHandler);
+
+
+module.exports = app;
+

backend/config/db.js

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+const mongoose = require('mongoose');
+
+const connectDB = async () => {
+  try {
+    const conn = await mongoose.connect(process.env.MONGO_URI, {
+    });
+    console.log(`MongoDB Connected: ${conn.connection.host}`);
+  } catch (error) {
+    console.error(`Error: ${error.message}`);
+    process.exit(1);
+  }
+};
+
+module.exports = connectDB;
+

backend/controllers/budgetController.js

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+const asyncHandler = require('express-async-handler');
+const Budget = require('../models/Budget');
+
+// @desc    Add a new budget
+// @route   POST /api/budgets
+// @access  Private
+const addBudget = asyncHandler(async (req, res) => {
+  const { name, totalAmount, categories, startDate, endDate } = req.body;
+
+  const budget = new Budget({
+    user: req.user._id,
+    name,
+    totalAmount,
+    categories,
+    startDate,
+    endDate,
+  });
+
+  const createdBudget = await budget.save();
+  res.status(201).json(createdBudget);
+});
+
+// @desc    Get all budgets
+// @route   GET /api/budgets
+// @access  Private
+const getBudgets = asyncHandler(async (req, res) => {
+  const { startDate, endDate, category, name } = req.query;
+  const query = { user: req.user._id };
+
+  if (startDate) {
+    query.startDate = { ...query.startDate, $gte: new Date(startDate) };
+  }
+  if (endDate) {
+    query.endDate = { ...query.endDate, $lte: new Date(endDate) };
+  }
+  if (category) {
+    query.categories = { $elemMatch: { category } };
+  }
+  if (name) {
+    query.name = name;
+  }
+
+  const budgets = await Budget.find(query);
+  res.json(budgets);
+});
+
+
+// @desc    Update budget
+// @route   PUT /api/budgets/:id
+// @access  Private
+const updateBudget = asyncHandler(async (req, res) => {
+  const { name, totalAmount, categories, startDate, endDate } = req.body;
+  const budget = await Budget.findById(req.params.id);
+
+  if (budget) {
+    budget.name = name || budget.name;
+    budget.totalAmount = totalAmount || budget.totalAmount;
+    budget.categories = categories || budget.categories;
+    budget.startDate = startDate || budget.startDate;
+    budget.endDate = endDate || budget.endDate;
+
+    const updatedBudget = await budget.save();
+    res.json(updatedBudget);
+  } else {
+    res.status(404);
+    throw new Error('Budget not found');
+  }
+});
+
+
+// @desc    Delete budget
+// @route   DELETE /api/budgets/:id
+// @access  Private
+const deleteBudget = asyncHandler(async (req, res) => {
+  const budget = await Budget.findById(req.params.id);
+  if (budget) {
+    await budget.deleteOne();
+    res.json({ message: 'Budget removed' });
+  } else {
+    res.status(404);
+    throw new Error('Budget not found');
+  }
+});
+
+module.exports = {
+  addBudget,
+  getBudgets,
+  updateBudget,
+  deleteBudget,
+};

backend/controllers/expenseController.js

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+// backend/controllers/expenseController.js
+const asyncHandler = require('express-async-handler');
+const Expense = require('../models/Expense');
+
+// @desc    Add new expense
+// @route   POST /api/expense
+// @access  Private
+const addExpense = asyncHandler(async (req, res) => {
+  const { date, category, amount, tag, notes } = req.body;
+
+  if (!date || !category || !amount || !tag) {
+    res.status(400);
+    throw new Error('Date, category, amount, and tag are required');
+  }
+
+  const expense = new Expense({
+    user: req.user._id,
+    date,
+    category,
+    amount,
+    tag,
+    notes,
+  });
+
+  const createdExpense = await expense.save();
+  res.status(201).json(createdExpense);
+});
+
+// @desc    Get all expenses
+// @route   GET /api/expense
+// @access  Private
+const getExpenses = asyncHandler(async (req, res) => {
+  const { category, startDate, endDate, minAmount, maxAmount, tag } = req.query;
+
+  const query = { user: req.user._id };
+
+  if (category) {
+    query.category = category;
+  }
+
+  if (startDate || endDate) {
+    query.date = {};
+    if (startDate) {
+      query.date.$gte = new Date(startDate);
+    }
+    if (endDate) {
+      query.date.$lte = new Date(endDate);
+    }
+  }
+
+  if (minAmount || maxAmount) {
+    query.amount = {};
+    if (minAmount) {
+      query.amount.$gte = Number(minAmount);
+    }
+    if (maxAmount) {
+      query.amount.$lte = Number(maxAmount);
+    }
+  }
+
+  if (tag) {
+    query.tag = tag;
+  }
+
+  const expenses = await Expense.find(query);
+  res.json(expenses);
+});
+
+// @desc    Update expense
+// @route   PUT /api/expense/:id
+// @access  Private
+const updateExpense = asyncHandler(async (req, res) => {
+  const { date, category, amount, tag, notes } = req.body;
+  if (!date || !category || !tag || isNaN(amount) || amount < 0) {
+    res.status(400);
+    throw new Error('Invalid data');
+  }
+
+  const expense = await Expense.findById(req.params.id);
+
+  if (expense) {
+    expense.date = date || expense.date;
+    expense.category = category || expense.category;
+    expense.amount = amount || expense.amount;
+    expense.tag = tag || expense.tag;
+    expense.notes = notes || expense.notes;
+
+    const updatedExpense = await expense.save();
+    res.json(updatedExpense);
+  } else {
+    res.status(404);
+    throw new Error('Expense not found');
+  }
+});
+
+// @desc    Delete expense
+// @route   DELETE /api/expense/:id
+// @access  Private
+const deleteExpense = asyncHandler(async (req, res) => {
+  const expense = await Expense.findById(req.params.id);
+
+  if (expense) {
+    await expense.deleteOne();
+    res.json({ message: 'Expense removed' });
+  } else {
+    res.status(404);
+    throw new Error('Expense not found');
+  }
+});
+
+module.exports = {
+  addExpense,
+  getExpenses,
+  updateExpense,
+  deleteExpense,
+};
+