diff --git a/.github/workflows/test.yml-template b/.github/workflows/test.yml-template
new file mode 100644
index 000000000..bb13dfc45
--- /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/package-lock.json b/package-lock.json
index ce07e1dca..59f8413ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "license": "GPL-3.0",
       "devDependencies": {
         "@mate-academy/eslint-config": "latest",
-        "@mate-academy/scripts": "^1.8.6",
+        "@mate-academy/scripts": "^2.1.3",
         "eslint": "^8.57.0",
         "eslint-plugin-jest": "^28.6.0",
         "eslint-plugin-node": "^11.1.0",
@@ -59,6 +59,7 @@
       "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.24.9.tgz",
       "integrity": "sha512-5e3FI4Q3M3Pbr21+5xJwCv6ZT6KmGkI0vw3Tozy5ODAQFTIWe37iT8Cr7Ice2Ntb+M3iSKCEWMB1MBgKrW3whg==",
       "dev": true,
+      "peer": true,
       "dependencies": {
         "@ampproject/remapping": "^2.2.0",
         "@babel/code-frame": "^7.24.7",
@@ -1467,10 +1468,11 @@
       }
     },
     "node_modules/@mate-academy/scripts": {
-      "version": "1.8.6",
-      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.8.6.tgz",
-      "integrity": "sha512-b4om/whj4G9emyi84ORE3FRZzCRwRIesr8tJHXa8EvJdOaAPDpzcJ8A0sFfMsWH9NUOVmOwkBtOXDu5eZZ00Ig==",
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-2.1.3.tgz",
+      "integrity": "sha512-a07wHTj/1QUK2Aac5zHad+sGw4rIvcNl5lJmJpAD7OxeSbnCdyI6RXUHwXhjF5MaVo9YHrJ0xVahyERS2IIyBQ==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@octokit/rest": "^17.11.2",
         "@types/get-port": "^4.2.0",
@@ -1536,7 +1538,6 @@
       "resolved": "https://registry.npmjs.org/@octokit/auth-token/-/auth-token-5.1.1.tgz",
       "integrity": "sha512-rh3G3wDO8J9wSjfI436JUKzHIxq8NaiL0tVeB2aXmG6p/9859aUOAjA9pmSPNGGZxfwmaJ9ozOJImuNVJdpvbA==",
       "dev": true,
-      "peer": true,
       "engines": {
         "node": ">= 18"
       }
@@ -1565,7 +1566,6 @@
       "resolved": "https://registry.npmjs.org/@octokit/endpoint/-/endpoint-10.1.1.tgz",
       "integrity": "sha512-JYjh5rMOwXMJyUpj028cu0Gbp7qe/ihxfJMLc8VZBMMqSwLgOxDI1911gV4Enl1QSavAQNJcwmwBF9M0VvLh6Q==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "@octokit/types": "^13.0.0",
         "universal-user-agent": "^7.0.2"
@@ -1579,7 +1579,6 @@
       "resolved": "https://registry.npmjs.org/@octokit/graphql/-/graphql-8.1.1.tgz",
       "integrity": "sha512-ukiRmuHTi6ebQx/HFRCXKbDlOh/7xEV6QUXaE7MJEKGNAncGI/STSbOkl12qVXZrfZdpXctx5O9X1AIaebiDBg==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "@octokit/request": "^9.0.0",
         "@octokit/types": "^13.0.0",
@@ -1593,8 +1592,7 @@
       "version": "22.2.0",
       "resolved": "https://registry.npmjs.org/@octokit/openapi-types/-/openapi-types-22.2.0.tgz",
       "integrity": "sha512-QBhVjcUa9W7Wwhm6DBFu6ZZ+1/t/oYxqc2tp81Pi41YNuJinbFRx8B133qVOrAaBbF7D/m0Et6f9/pZt9Rc+tg==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "node_modules/@octokit/plugin-paginate-rest": {
       "version": "2.21.3",
@@ -1656,7 +1654,6 @@
       "resolved": "https://registry.npmjs.org/@octokit/request/-/request-9.1.3.tgz",
       "integrity": "sha512-V+TFhu5fdF3K58rs1pGUJIDH5RZLbZm5BI+MNF+6o/ssFNT4vWlCh/tVpF3NxGtP15HUxTTMUbsG5llAuU2CZA==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "@octokit/endpoint": "^10.0.0",
         "@octokit/request-error": "^6.0.1",
@@ -1672,7 +1669,6 @@
       "resolved": "https://registry.npmjs.org/@octokit/request-error/-/request-error-6.1.4.tgz",
       "integrity": "sha512-VpAhIUxwhWZQImo/dWAN/NpPqqojR6PSLgLYAituLM6U+ddx9hCioFGwBr5Mi+oi5CLeJkcAs3gJ0PYYzU6wUg==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "@octokit/types": "^13.0.0"
       },
@@ -1860,7 +1856,6 @@
       "resolved": "https://registry.npmjs.org/@octokit/types/-/types-13.5.0.tgz",
       "integrity": "sha512-HdqWTf5Z3qwDVlzCrP8UJquMwunpDiMPt5er+QjGzL4hqr/vBVY/MauQgS1xWxCDT1oMx1EULyqxncdCY/NVSQ==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "@octokit/openapi-types": "^22.2.0"
       }
@@ -2203,6 +2198,7 @@
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.1.tgz",
       "integrity": "sha512-tcpGyI9zbizT9JbV6oYE477V6mTlXvvi0T0G3SNIYE2apm/G5huBa1+K89VGeovbg+jycCrfhl3ADxErOuO6Jg==",
       "dev": true,
+      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -2624,8 +2620,7 @@
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/before-after-hook/-/before-after-hook-3.0.2.tgz",
       "integrity": "sha512-Nik3Sc0ncrMK4UUdXQmAnRtzmNQTAAXmXIopizwZ1W1t8QmfJj+zL4OA2I7XPTPW5z5TDqv4hRo/JzouDJnX3A==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "node_modules/brace-expansion": {
       "version": "1.1.11",
@@ -2668,6 +2663,7 @@
           "url": "https://github.com/sponsors/ai"
         }
       ],
+      "peer": true,
       "dependencies": {
         "caniuse-lite": "^1.0.30001640",
         "electron-to-chromium": "^1.4.820",
@@ -3381,6 +3377,7 @@
       "resolved": "https://registry.npmjs.org/eslint/-/eslint-8.57.0.tgz",
       "integrity": "sha512-dZ6+mexnaTIbSBZWgou51U6OmzIhYM2VcNdtiTtI7qPNZm35Akpr0f6vtw3w1Kmn5PYo+tZVfh13WrhpS6oLqQ==",
       "dev": true,
+      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.2.0",
         "@eslint-community/regexpp": "^4.6.1",
@@ -3436,6 +3433,7 @@
       "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-9.1.0.tgz",
       "integrity": "sha512-NSWl5BFQWEPi1j4TjVNItzYV7dZXZ+wP6I6ZhrBGpChQhZRUaElihE9uRRkcbRnNb76UMKDF3r+WTmNcGPKsqw==",
       "dev": true,
+      "peer": true,
       "bin": {
         "eslint-config-prettier": "bin/cli.js"
       },
@@ -3526,6 +3524,7 @@
       "resolved": "https://registry.npmjs.org/eslint-plugin-import/-/eslint-plugin-import-2.29.1.tgz",
       "integrity": "sha512-BbPC0cuExzhiMo4Ff1BTVwHpjjv28C5R+btTOGaCRC7UEz801up0JadwkeSk5Ued6TG34uaczuVuH6qyy5YUxw==",
       "dev": true,
+      "peer": true,
       "dependencies": {
         "array-includes": "^3.1.7",
         "array.prototype.findlastindex": "^1.2.3",
@@ -3603,6 +3602,7 @@
       "resolved": "https://registry.npmjs.org/eslint-plugin-node/-/eslint-plugin-node-11.1.0.tgz",
       "integrity": "sha512-oUwtPJ1W0SKD0Tr+wqu92c5xuCeQqB3hSCHasn/ZgjFdA9iDGNkNf2Zi9ztY7X+hNuMib23LNGRm6+uN+KLE3g==",
       "dev": true,
+      "peer": true,
       "dependencies": {
         "eslint-plugin-es": "^3.0.0",
         "eslint-utils": "^2.0.0",
@@ -3653,6 +3653,7 @@
       "resolved": "https://registry.npmjs.org/eslint-plugin-promise/-/eslint-plugin-promise-4.3.1.tgz",
       "integrity": "sha512-bY2sGqyptzFBDLh/GMbAxfdJC+b0f23ME63FOE4+Jao0oZ3E1LEwFtWJX/1pGMJLiTtrSSern2CRM/g+dfc0eQ==",
       "dev": true,
+      "peer": true,
       "engines": {
         "node": ">=6"
       }
@@ -3676,6 +3677,7 @@
           "url": "https://feross.org/support"
         }
       ],
+      "peer": true,
       "peerDependencies": {
         "eslint": ">=5.0.0"
       }
@@ -5044,6 +5046,7 @@
       "resolved": "https://registry.npmjs.org/jest/-/jest-29.7.0.tgz",
       "integrity": "sha512-NIy3oAFp9shda19hy4HK0HRTWKtPJmGdnvywu01nOqNC2vZg+Z+fvJDxpMQA88eb2I9EcafcdjYgsDthnYTvGw==",
       "dev": true,
+      "peer": true,
       "dependencies": {
         "@jest/core": "^29.7.0",
         "@jest/types": "^29.6.3",
@@ -7376,6 +7379,7 @@
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.3.3.tgz",
       "integrity": "sha512-i2tDNA0O5IrMO757lfrdQZCc2jPNDVntV0m/+4whiDfWaTKfMNgR7Qz0NAeGz/nRqF4m5/6CLzbP4/liHt12Ew==",
       "dev": true,
+      "peer": true,
       "bin": {
         "prettier": "bin/prettier.cjs"
       },
@@ -8307,8 +8311,7 @@
       "version": "7.0.2",
       "resolved": "https://registry.npmjs.org/universal-user-agent/-/universal-user-agent-7.0.2.tgz",
       "integrity": "sha512-0JCqzSKnStlRRQfCdowvqy3cy0Dvtlb8xecj/H8JFZuCze4rwjPZQOgvFvn0Ws/usCHQFGpyr+pB9adaGwXn4Q==",
-      "dev": true,
-      "peer": true
+      "dev": true
     },
     "node_modules/universalify": {
       "version": "2.0.1",
diff --git a/package.json b/package.json
index 4f64337fe..78cfd0b37 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^2.1.3",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",
diff --git a/src/index.js b/src/index.js
index ad9a93a7c..ae708caa9 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1 +1,114 @@
-'use strict';
+import express from 'express';
+import cors from 'cors';
+import { WebSocketServer } from 'ws';
+
+const app = express();
+app.use(cors());
+app.use(express.json());
+
+const PORT = process.env.PORT || 3000;
+const rooms = { general: [] }; // одразу створюємо general
+
+function ensureRoom(room) {
+  if (!rooms[room]) rooms[room] = [];
+}
+
+function broadcast(room, data) {
+  wss.clients.forEach((client) => {
+    if (client.room === room && client.readyState === 1) {
+      client.send(JSON.stringify(data));
+    }
+  });
+}
+
+app.get('/messages', (req, res) => {
+  const room = req.query.room || 'general';
+  res.send(rooms[room] || []);
+});
+
+app.post('/messages', (req, res) => {
+  const { text, author, room = 'general' } = req.body;
+
+  ensureRoom(room);
+
+  const message = { text, author, time: new Date(), room };
+  rooms[room].push(message);
+
+  broadcast(room, { type: 'message', ...message });
+
+  res.status(201).send(message);
+});
+
+app.get('/rooms', (req, res) => {
+  res.send(Object.keys(rooms));
+});
+
+app.post('/rooms', (req, res) => {
+  const { name } = req.body;
+  ensureRoom(name);
+  res.status(201).send({ name });
+});
+
+app.delete('/rooms/:name', (req, res) => {
+  const { name } = req.params;
+
+  if (!rooms[name]) {
+    return res.status(404).send({ error: 'Room not found' });
+  }
+
+  delete rooms[name];
+
+  wss.clients.forEach((client) => {
+    if (client.room === name) {
+      client.room = 'general';
+      client.send(
+        JSON.stringify({
+          type: 'room_deleted',
+          redirectTo: 'general',
+        }),
+      );
+    }
+  });
+
+  res.send({ deleted: name });
+});
+
+
+const server = app.listen(PORT, () => {
+  console.log(`Server running on http://localhost:${PORT}`);
+});
+
+const wss = new WebSocketServer({ server });
+
+wss.on('connection', (socket) => {
+  socket.room = 'general';
+
+  socket.on('message', (data) => {
+    const msg = JSON.parse(data);
+
+    if (msg.type === 'join') {
+      ensureRoom(msg.room);
+      socket.room = msg.room;
+
+      socket.send(
+        JSON.stringify({
+          type: 'history',
+          messages: rooms[msg.room],
+        }),
+      );
+      return;
+    }
+
+    if (msg.type === 'message') {
+      const message = {
+        text: msg.text,
+        author: msg.author,
+        time: new Date(),
+        room: socket.room,
+      };
+
+      rooms[socket.room].push(message);
+      broadcast(socket.room, { type: 'message', ...message });
+    }
+  });
+});