diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..5230ec0
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,21 @@
+services:
+  webserver:
+    image: nginx:stable-alpine
+    restart: unless-stopped
+    volumes:
+      - ./index.php:/var/www/html/index.php
+      - ./docker/nginx/conf.d:/etc/nginx/conf.d
+    working_dir: /var/www/html
+    ports:
+      - "8080:80"
+    depends_on:
+      - php
+
+  php:
+    image: php:8.4-fpm-alpine
+    restart: unless-stopped
+    environment:
+      MAX_FILE_SIZE: 1024000
+    volumes:
+      - ./index.php:/var/www/html/index.php
+      - ./missing_timezones:/var/www/html/missing_timezones
diff --git a/docker/nginx/conf.d/default.conf b/docker/nginx/conf.d/default.conf
new file mode 100644
index 0000000..ed1b395
--- /dev/null
+++ b/docker/nginx/conf.d/default.conf
@@ -0,0 +1,22 @@
+server {
+    listen 80 default_server;
+    listen [::]:80 default_server;
+    root /var/www/html;
+    index index.php index.html;
+    server_name _;
+    client_max_body_size 16M;
+
+    location / {
+        try_files $uri $uri/ /index.php?$query_string;
+    }
+
+    location ~ \.php$ {
+        try_files $uri =404;
+        fastcgi_split_path_info ^(.+\.php)(/.+)$;
+        fastcgi_pass php:9000;
+        fastcgi_index index.php;
+        include fastcgi_params;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        fastcgi_param PATH_INFO $fastcgi_path_info;
+    }
+}
diff --git a/index.php b/index.php
index a99308e..1c90ed9 100644
--- a/index.php
+++ b/index.php
@@ -1,6 +1,15 @@
 <?php
-// Define constants
-define('MAX_FILE_SIZE', 819200); // 800 kB
+declare(strict_types=1);
+
+const DEFAULT_MAX_FILE_SIZE = 819200;
+
+$maxFileSize = getenv('MAX_FILE_SIZE', true);
+
+if ($maxFileSize === false) {
+    $maxFileSize = DEFAULT_MAX_FILE_SIZE;
+}
+
+define('MAX_FILE_SIZE', $maxFileSize);
 define('MISSING_TIMEZONES_FILE', __DIR__ . '/missing_timezones');
 
 // Main execution
@@ -17,7 +26,8 @@
 }
 
 // Function to get the ICS URL from the query parameter
-function getIcsUrl() {
+function getIcsUrl()
+{
     if (!isset($_GET['ics_url']) || empty($_GET['ics_url'])) {
         outputInstructions();
         exit;
@@ -26,7 +36,8 @@ function getIcsUrl() {
 }
 
 // Function to display usage instructions
-function outputInstructions() {
+function outputInstructions()
+{
     echo "<h1>ICS Timezone Fixer</h1>";
     echo "<p>This tool modifies a provided .ics calendar file to include missing timezones, ensuring accurate event times in Google Calendar and other apps.</p>";
     echo "<h2>How to Use:</h2>";
@@ -41,7 +52,8 @@ function outputInstructions() {
 }
 
 // Function to validate the provided URL and enforce HTTPS
-function validateUrl($url) {
+function validateUrl($url)
+{
     if (!filter_var($url, FILTER_VALIDATE_URL)) {
         throw new Exception('Invalid URL.');
     }
@@ -54,7 +66,8 @@ function validateUrl($url) {
 }
 
 // Function to validate the file content by downloading a small portion
-function validateFileContent($url) {
+function validateFileContent($url)
+{
     $ch = curl_init($url);
     if ($ch === false) {
         throw new Exception('Failed to initialize cURL for partial content download.');
@@ -63,7 +76,7 @@ function validateFileContent($url) {
     $partialContent = '';
     $maxBytes = 1024; // Read first 1 KB
 
-    $writeFunction = function($ch, $data) use (&$partialContent, $maxBytes) {
+    $writeFunction = function ($ch, $data) use (&$partialContent, $maxBytes) {
         $length = strlen($data);
         $partialContent .= $data;
         if (strlen($partialContent) >= $maxBytes) {
@@ -97,7 +110,8 @@ function validateFileContent($url) {
 }
 
 // Function to fetch the ICS content with a size limit
-function fetchIcsContent($url, $maxFileSize) {
+function fetchIcsContent($url, $maxFileSize)
+{
     $ch = curl_init($url);
     if ($ch === false) {
         throw new Exception('Failed to initialize cURL.');
@@ -107,7 +121,7 @@ function fetchIcsContent($url, $maxFileSize) {
     $totalDownloaded = 0;
 
     // Define the write function callback
-    $writeFunction = function($ch, $data) use (&$icsContent, &$totalDownloaded, $maxFileSize) {
+    $writeFunction = function ($ch, $data) use (&$icsContent, &$totalDownloaded, $maxFileSize) {
         $length = strlen($data);
         $totalDownloaded += $length;
 
@@ -130,7 +144,7 @@ function fetchIcsContent($url, $maxFileSize) {
     if ($result === false) {
         if (curl_errno($ch) == CURLE_WRITE_ERROR && $totalDownloaded > $maxFileSize) {
             curl_close($ch);
-            throw new Exception('The ICS file exceeds the maximum allowed size of 800 kB.');
+            throw new Exception(sprintf('The ICS file exceeds the maximum allowed size of %d kB.', $maxFileSize / 1024));
         } else {
             $error = curl_error($ch);
             curl_close($ch);
@@ -144,7 +158,8 @@ function fetchIcsContent($url, $maxFileSize) {
 }
 
 // Function to read the missing timezones from the side file
-function readMissingTimezones($filename) {
+function readMissingTimezones($filename)
+{
     if (!file_exists($filename)) {
         throw new Exception('Missing timezones file not found.');
     }
@@ -158,7 +173,8 @@ function readMissingTimezones($filename) {
 }
 
 // Function to insert missing timezones into the ICS content
-function insertMissingTimezones($icsContent, $missingTimezones) {
+function insertMissingTimezones($icsContent, $missingTimezones)
+{
     $pos = strpos($icsContent, 'BEGIN:VEVENT');
     if ($pos === false) {
         throw new Exception('Invalid ICS file format.');
@@ -170,11 +186,13 @@ function insertMissingTimezones($icsContent, $missingTimezones) {
 }
 
 // Function to output the modified ICS content with appropriate headers
-function outputIcsContent($modifiedIcsContent) {
+function outputIcsContent($modifiedIcsContent)
+{
     // Now that everything is validated and modified, set the content type headers
     header('Content-Type: text/calendar; charset=utf-8');
     header('Content-Disposition: attachment; filename="modified_calendar.ics"');
 
     echo $modifiedIcsContent;
 }
+
 ?>