diff --git a/.github/workflows/test.yml-template b/.github/workflows/test.yml-template
new file mode 100644
index 0000000..bb13dfc
--- /dev/null
+++ b/.github/workflows/test.yml-template
@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..4239d16
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Node Form Data</title>
+</head>
+<body>
+  <form method="POST" action="/add-expense">
+    <div>
+      <label for="date">Date:</label>
+      <input type="date" id="date" name="date" required>
+    </div>
+    <div>
+      <label for="title">Title:</label>
+      <input type="text" id="title" name="title" required>
+    </div>
+    <div>
+      <label for="amount">Amount:</label>
+      <input type="number" id="amount" name="amount" step="0.01" required>
+    </div>
+    <button type="submit">Submit</button>
+  </form>
+</body>
+</html>
diff --git a/src/createServer.js b/src/createServer.js
index 1cf1dda..966f056 100644
--- a/src/createServer.js
+++ b/src/createServer.js
@@ -1,8 +1,101 @@
 'use strict';
 
+const { Server } = require('http');
+const fs = require('fs');
+const path = require('path');
+const mime = require('mime-types');
+const querystring = require('querystring');
+
+const dbPath = path.resolve(__dirname, '../db/expense.json');
+
 function createServer() {
-  /* Write your code here */
-  // Return instance of http.Server class
+  const server = new Server();
+
+  server.on('request', (req, res) => {
+    try {
+      const url = new URL(req.url || '', `http://${req.headers.host}`);
+      const requestedPath = url.pathname.slice(1) || 'index.html';
+      const realPath = path.join('public', requestedPath);
+      const mimeType = mime.contentType(path.extname(realPath)) || 'text/plain';
+
+      if (requestedPath === 'add-expense') {
+        if (req.method === 'POST') {
+          const chunks = [];
+
+          req.on('data', (chunk) => chunks.push(chunk));
+
+          req.on('end', () => {
+            const body = Buffer.concat(chunks).toString();
+            const contentType = req.headers['content-type'] || '';
+            const isJSON = contentType.includes('application/json');
+            const { date, title, amount } = isJSON
+              ? JSON.parse(body) || {}
+              : querystring.parse(body) || {};
+
+            if (!date || !title || !amount) {
+              res.statusCode = 400;
+              res.setHeader('Content-Type', 'text/plain');
+              res.end('Invalid form');
+
+              return;
+            }
+
+            fs.writeFileSync(
+              dbPath,
+              JSON.stringify({ date, title, amount }, null, 2),
+            );
+
+            if (isJSON) {
+              res.writeHead(200, { 'Content-Type': 'application/json' });
+              res.end(JSON.stringify({ date, title, amount }));
+
+              return;
+            }
+
+            res.writeHead(200, { 'Content-Type': 'text/html' });
+
+            res.end(`
+              <!doctype html>
+              <html lang="en">
+                <head>
+                  <meta charset="UTF-8" />
+                  <title>Expense saved</title>
+                </head>
+                <body>
+                  <h1>Expense saved</h1>
+                  <pre>${JSON.stringify({ date, title, amount }, null, 2)}</pre>
+                  <a href="/">Back</a>
+                </body>
+              </html>
+            `);
+          });
+        } else {
+          res.statusCode = 400;
+          res.end('Wrong method!');
+        }
+
+        return;
+      }
+
+      if (!fs.existsSync(realPath)) {
+        res.statusCode = 404;
+        res.end('Not Found');
+
+        return;
+      }
+
+      const dataStream = fs.createReadStream(realPath);
+
+      res.statusCode = 200;
+      res.setHeader('Content-Type', mimeType);
+      dataStream.pipe(res);
+    } catch (error) {
+      res.statusCode = 500;
+      res.end('Server Error');
+    }
+  });
+
+  return server;
 }
 
 module.exports = {
