diff --git a/package-lock.json b/package-lock.json
index 3fb12fd..fe39c38 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "cors": "^2.8.5",
-        "express": "^4.18.2",
+        "express": "^4.19.2",
         "morgan": "^1.10.0",
         "nodemon": "^3.0.1"
       },
@@ -1410,12 +1410,12 @@
       }
     },
     "node_modules/body-parser": {
-      "version": "1.20.1",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
-      "integrity": "sha512-jWi7abTbYwajOytWCQc37VulmWiRae5RyTpaCyDcS5/lMdtwSz5lOpDE67srw/HYe35f1z3fDQw+3txg7gNtWw==",
+      "version": "1.20.2",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.2.tgz",
+      "integrity": "sha512-ml9pReCu3M61kGlqoTm2umSXTlRTuGTx0bfYj+uIUKKYycG5NtSbeetV3faSU6R7ajOPw0g/J1PvK4qNy7s5bA==",
       "dependencies": {
         "bytes": "3.1.2",
-        "content-type": "~1.0.4",
+        "content-type": "~1.0.5",
         "debug": "2.6.9",
         "depd": "2.0.0",
         "destroy": "1.2.0",
@@ -1423,7 +1423,7 @@
         "iconv-lite": "0.4.24",
         "on-finished": "2.4.1",
         "qs": "6.11.0",
-        "raw-body": "2.5.1",
+        "raw-body": "2.5.2",
         "type-is": "~1.6.18",
         "unpipe": "1.0.0"
       },
@@ -1730,9 +1730,9 @@
       "dev": true
     },
     "node_modules/cookie": {
-      "version": "0.5.0",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.5.0.tgz",
-      "integrity": "sha512-YZ3GUyn/o8gfKJlnlX7g7xq4gyO6OSuhGPKaaGssGB2qgDUS0gPgtTvoyZLTt9Ab6dC4hfc9dV5arkvc/OCmrw==",
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.6.0.tgz",
+      "integrity": "sha512-U71cyTamuh1CRNCfpGY6to28lxvNwPG4Guz/EVjgf3Jmzv0vlDp1atT9eS5dDjMYHucpHbWns6Lwf3BKz6svdw==",
       "engines": {
         "node": ">= 0.6"
       }
@@ -2032,16 +2032,16 @@
       }
     },
     "node_modules/express": {
-      "version": "4.18.2",
-      "resolved": "https://registry.npmjs.org/express/-/express-4.18.2.tgz",
-      "integrity": "sha512-5/PsL6iGPdfQ/lKM1UuielYgv3BUoJfz1aUwU9vHZ+J7gyvwdQXFEBIEIaxeGf0GIcreATNyBExtalisDbuMqQ==",
+      "version": "4.19.2",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.19.2.tgz",
+      "integrity": "sha512-5T6nhjsT+EOMzuck8JjBHARTHfMht0POzlA60WV2pMD3gyXw2LZnZ+ueGdNxG+0calOJcWKbpFcuzLZ91YWq9Q==",
       "dependencies": {
         "accepts": "~1.3.8",
         "array-flatten": "1.1.1",
-        "body-parser": "1.20.1",
+        "body-parser": "1.20.2",
         "content-disposition": "0.5.4",
         "content-type": "~1.0.4",
-        "cookie": "0.5.0",
+        "cookie": "0.6.0",
         "cookie-signature": "1.0.6",
         "debug": "2.6.9",
         "depd": "2.0.0",
@@ -4013,9 +4013,9 @@
       }
     },
     "node_modules/raw-body": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.1.tgz",
-      "integrity": "sha512-qqJBtEyVgS0ZmPGdCFPWJ3FreoqvG4MVQln/kCgF7Olq95IbOp0/BWyMwbdtn4VTvkM8Y7khCQ2Xgk/tcrCXig==",
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.2.tgz",
+      "integrity": "sha512-8zGqypfENjCIqGhgXToC8aB2r7YrBX+AQAfIPs/Mlk+BtPTztOvTS01NRW/3Eh60J+a48lt8qsCzirQ6loCVfA==",
       "dependencies": {
         "bytes": "3.1.2",
         "http-errors": "2.0.0",
diff --git a/package.json b/package.json
index ec6510a..d8aab1f 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   "homepage": "https://github.com/boolean-uk/api-address-book#readme",
   "dependencies": {
     "cors": "^2.8.5",
-    "express": "^4.18.2",
+    "express": "^4.19.2",
     "morgan": "^1.10.0",
     "nodemon": "^3.0.1"
   },
diff --git a/src/index.js b/src/index.js
index 8c18618..b7d4462 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,6 +1,6 @@
-const app = require('./server.js')
-const port = 3030
+const app = require('./server');
+const port = process.env.PORT || 3000;
 
 app.listen(port, () => {
- console.log(`Server is running on http://localhost:${port}/`)
-})
+    console.log(`Server is running on http://localhost:${port}`);
+});
diff --git a/src/server.js b/src/server.js
index 30f0ce3..30d4de2 100644
--- a/src/server.js
+++ b/src/server.js
@@ -1,13 +1,104 @@
-const express = require("express")
-const morgan = require("morgan")
-const cors = require("cors")
-const app = express()
+const express = require('express');
+const app = express();
 
-app.use(morgan("dev"))
-app.use(cors())
-app.use(express.json())
+app.use(express.json());
 
-// write your app code here
+// Data
+let contacts = [
+    { id: 1, firstName: "John", lastName: "Carmack" },
+    { id: 2, firstName: "Grace", lastName: "Hopper" }
+];
 
+let meetings = [
+    { id: 1, name: "a test meeting about life", contactId: 1 },
+    { id: 2, name: "another test meeting for wondering about existence", contactId: 2 },
+    { id: 3, name: "a new meeting for the hopeful", contactId: 1 }
+];
 
-module.exports = app
+// Routes for contacts
+app.get('/contacts', (req, res) => {
+    res.json({ contacts });
+});
+
+app.get('/contacts/:id', (req, res) => {
+    const contact = contacts.find(c => c.id === parseInt(req.params.id));
+    if (!contact) {
+        return res.status(404).send('Contact not found');
+    }
+    res.json({ contact });
+});
+
+app.post('/contacts', (req, res) => {
+    const newContact = { ...req.body, id: contacts.length + 1 };
+    contacts.push(newContact);
+    res.status(201).json({ contact: newContact });
+});
+
+app.put('/contacts/:id', (req, res) => {
+    const contact = contacts.find(c => c.id === parseInt(req.params.id));
+    if (!contact) {
+        return res.status(404).send('Contact not found');
+    }
+    Object.assign(contact, req.body);
+    res.json({ contact });
+});
+
+app.delete('/contacts/:id', (req, res) => {
+    const contactIndex = contacts.findIndex(c => c.id === parseInt(req.params.id));
+    if (contactIndex === -1) {
+        return res.status(404).send('Contact not found');
+    }
+    const [deletedContact] = contacts.splice(contactIndex, 1);
+    meetings = meetings.filter(m => m.contactId !== deletedContact.id);
+    res.json({ contact: deletedContact });
+});
+
+// Routes for meetings
+app.get('/meetings', (req, res) => {
+    res.json({ meetings });
+});
+
+app.get('/meetings/:id', (req, res) => {
+    const meeting = meetings.find(m => m.id === parseInt(req.params.id));
+    if (!meeting) {
+        return res.status(404).send('Meeting not found');
+    }
+    res.json({ meeting });
+});
+
+app.post('/contacts/:id/meetings', (req, res) => {
+    const contactId = parseInt(req.params.id);
+    const contact = contacts.find(c => c.id === contactId);
+    if (!contact) {
+        return res.status(404).send('Contact not found');
+    }
+    const newMeeting = { ...req.body, id: meetings.length + 1, contactId };
+    meetings.push(newMeeting);
+    res.status(201).json({ meeting: newMeeting });
+});
+
+app.put('/meetings/:id', (req, res) => {
+    const meeting = meetings.find(m => m.id === parseInt(req.params.id));
+    if (!meeting) {
+        return res.status(404).send('Meeting not found');
+    }
+    Object.assign(meeting, req.body);
+    res.json({ meeting });
+});
+
+app.delete('/meetings/:id', (req, res) => {
+    const meetingIndex = meetings.findIndex(m => m.id === parseInt(req.params.id));
+    if (meetingIndex === -1) {
+        return res.status(404).send('Meeting not found');
+    }
+    const [deletedMeeting] = meetings.splice(meetingIndex, 1);
+    res.json({ meeting: deletedMeeting });
+});
+
+app.get('/contacts/:id/meetings', (req, res) => {
+    const contactId = parseInt(req.params.id);
+    const contactMeetings = meetings.filter(m => m.contactId === contactId);
+    res.json({ meetings: contactMeetings });
+});
+
+module.exports = app;