diff --git a/package-lock.json b/package-lock.json
index 8a6cf7e..edfb3b2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,6 +24,7 @@
             },
             "devDependencies": {
                 "@jitsi/eslint-config": "^4.1.0",
+                "@types/dotenv": "^8.2.0",
                 "@typescript-eslint/eslint-plugin": "5.30.5",
                 "@typescript-eslint/parser": "5.30.4",
                 "eslint": "8.1.0",
@@ -620,6 +621,16 @@
             "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.5.tgz",
             "integrity": "sha512-Q1y515GcOdTHgagaVFhHnIFQ38ygs/kmxdNpvpou+raI9UO3YZcHDngBSYKQklcKlvA7iuQlmIKbzvmxcOE9CQ=="
         },
+        "node_modules/@types/dotenv": {
+            "version": "8.2.0",
+            "resolved": "https://registry.npmjs.org/@types/dotenv/-/dotenv-8.2.0.tgz",
+            "integrity": "sha512-ylSC9GhfRH7m1EUXBXofhgx4lUWmFeQDINW5oLuS+gxWdfUeW4zJdeVTYVkexEW+e2VUvlZR2kGnGGipAWR7kw==",
+            "deprecated": "This is a stub types definition. dotenv provides its own type definitions, so you do not need this installed.",
+            "dev": true,
+            "dependencies": {
+                "dotenv": "*"
+            }
+        },
         "node_modules/@types/express": {
             "version": "4.17.11",
             "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.11.tgz",
@@ -5282,6 +5293,15 @@
             "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.5.tgz",
             "integrity": "sha512-Q1y515GcOdTHgagaVFhHnIFQ38ygs/kmxdNpvpou+raI9UO3YZcHDngBSYKQklcKlvA7iuQlmIKbzvmxcOE9CQ=="
         },
+        "@types/dotenv": {
+            "version": "8.2.0",
+            "resolved": "https://registry.npmjs.org/@types/dotenv/-/dotenv-8.2.0.tgz",
+            "integrity": "sha512-ylSC9GhfRH7m1EUXBXofhgx4lUWmFeQDINW5oLuS+gxWdfUeW4zJdeVTYVkexEW+e2VUvlZR2kGnGGipAWR7kw==",
+            "dev": true,
+            "requires": {
+                "dotenv": "*"
+            }
+        },
         "@types/express": {
             "version": "4.17.11",
             "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.11.tgz",
diff --git a/package.json b/package.json
index cc56a38..6cb909c 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
     },
     "devDependencies": {
         "@jitsi/eslint-config": "^4.1.0",
+        "@types/dotenv": "^8.2.0",
         "@typescript-eslint/eslint-plugin": "5.30.5",
         "@typescript-eslint/parser": "5.30.4",
         "eslint": "8.1.0",
diff --git a/src/index.ts b/src/index.ts
index 998beb4..e722496 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,100 +1,101 @@
-import debug from "debug";
-import express from "express";
-import http from "http";
-import socketIO from "socket.io";
-import * as prometheus from "socket.io-prometheus-metrics";
+import debug from 'debug';
+import dotenv from 'dotenv';
+import express from 'express';
+import http from 'http';
+import socketIO from 'socket.io';
+import * as prometheus from 'socket.io-prometheus-metrics';
 
-const serverDebug = debug("server");
-const ioDebug = debug("io");
-const socketDebug = debug("socket");
+const serverDebug = debug('server');
+const ioDebug = debug('io');
+const socketDebug = debug('socket');
 
-require("dotenv").config(
-  process.env.NODE_ENV !== "development"
-    ? { path: ".env.production" }
-    : { path: ".env.development" },
+dotenv.config(
+  process.env.NODE_ENV === 'development'
+      ? { path: '.env.development' }
+      : { path: '.env.production' }
 );
 
 const app = express();
 const port = process.env.PORT || 80; // default port to listen
 
-app.use(express.static("public"));
+app.use(express.static('public'));
 
-app.get("/", (req, res) => {
-  res.send("Excalidraw backend is up :)");
+app.get('/', (req, res) => {
+    res.send('Excalidraw backend is up :)');
 });
 
 const server = http.createServer(app);
 
 server.listen(port, () => {
-  serverDebug(`listening on port: ${port}`);
+    serverDebug(`listening on port: ${port}`);
 });
 
 const io = socketIO(server, {
-  handlePreflightRequest: (req, res) => {
-    const headers = {
-      "Access-Control-Allow-Headers": "Content-Type, Authorization",
-      "Access-Control-Allow-Origin":
-        (req.header && req.header.origin) || "https://meet.jit.si",
-      "Access-Control-Allow-Credentials": true,
-    };
-    res.writeHead(200, headers);
-    res.end();
-  },
+    handlePreflightRequest: (req, res) => {
+        const headers = {
+            'Access-Control-Allow-Headers': 'Content-Type, Authorization',
+            'Access-Control-Allow-Origin': req.header?.origin ?? 'https://meet.jit.si',
+            'Access-Control-Allow-Credentials': true
+        };
+
+        res.writeHead(200, headers);
+        res.end();
+    }
 });
 
 // listens on host:9090/metrics
 prometheus.metrics(io, {
-  collectDefaultMetrics: true
+    collectDefaultMetrics: true
 });
 
-io.on("connection", (socket) => {
-  ioDebug("connection established!");
-  io.to(`${socket.id}`).emit("init-room");
-  socket.on("join-room", (roomID) => {
-    socketDebug(`${socket.id} has joined ${roomID}`);
-    socket.join(roomID);
-    if (io.sockets.adapter.rooms[roomID].length <= 1) {
-      io.to(`${socket.id}`).emit("first-in-room");
-    } else {
-      socket.broadcast.to(roomID).emit("new-user", socket.id);
+io.on('connection', socket => {
+    ioDebug('connection established!');
+    io.to(`${socket.id}`).emit('init-room');
+    socket.on('join-room', roomID => {
+        socketDebug(`${socket.id} has joined ${roomID}`);
+        socket.join(roomID);
+        if (io.sockets.adapter.rooms[roomID].length <= 1) {
+            io.to(`${socket.id}`).emit('first-in-room');
+        } else {
+            socket.broadcast.to(roomID).emit('new-user', socket.id);
+        }
+        io.in(roomID).emit(
+      'room-user-change',
+      Object.keys(io.sockets.adapter.rooms[roomID].sockets)
+        );
+    });
+
+    socket.on(
+    'server-broadcast',
+    (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
+        socketDebug(`${socket.id} sends update to ${roomID}`);
+        socket.broadcast.to(roomID).emit('client-broadcast', encryptedData, iv);
     }
-    io.in(roomID).emit(
-      "room-user-change",
-      Object.keys(io.sockets.adapter.rooms[roomID].sockets),
     );
-  });
 
-  socket.on(
-    "server-broadcast",
+    socket.on(
+    'server-volatile-broadcast',
     (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
-      socketDebug(`${socket.id} sends update to ${roomID}`);
-      socket.broadcast.to(roomID).emit("client-broadcast", encryptedData, iv);
-    },
-  );
-
-  socket.on(
-    "server-volatile-broadcast",
-    (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
-      socketDebug(`${socket.id} sends volatile update to ${roomID}`);
-      socket.volatile.broadcast
+        socketDebug(`${socket.id} sends volatile update to ${roomID}`);
+        socket.volatile.broadcast
         .to(roomID)
-        .emit("client-broadcast", encryptedData, iv);
-    },
-  );
-
-  socket.on("disconnecting", () => {
-    const rooms = io.sockets.adapter.rooms;
-    for (const roomID in socket.rooms) {
-      const clients = Object.keys(rooms[roomID].sockets).filter(
-        (id) => id !== socket.id,
-      );
-      if (clients.length > 0) {
-        socket.broadcast.to(roomID).emit("room-user-change", clients);
-      }
+        .emit('client-broadcast', encryptedData, iv);
     }
-  });
+    );
 
-  socket.on("disconnect", () => {
-    socket.removeAllListeners();
-  });
+    socket.on('disconnecting', () => {
+        const rooms = io.sockets.adapter.rooms;
+
+        for (const roomID of Object.keys(socket.rooms)) {
+            const clients = Object.keys(rooms[roomID].sockets).filter(id => id !== socket.id);
+
+            if (clients.length > 0) {
+                socket.broadcast.to(roomID).emit('room-user-change', clients);
+            }
+        }
+    });
+
+    socket.on('disconnect', () => {
+        socket.removeAllListeners();
+    });
 });