diff --git a/.gitignore b/.gitignore
index a2d9a85..4897e6f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,3 @@
 
 .idea
 config.php
-www.bat
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..b2458ea
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,20 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [1.0.0] - 14-04-2022
+### Fixed
+- Undefined warning when refreshing a page after execution.
+- Traceroute error when there is no PID found.
+
+### Added
+- Added Docker support.
+- This CHANGELOG.md to track changes.
+
+## [0.1.0] - 17-01-2022
+### Changed
+- First release.
\ No newline at end of file
diff --git a/LookingGlass.php b/LookingGlass.php
index 9f28782..043b651 100644
--- a/LookingGlass.php
+++ b/LookingGlass.php
@@ -311,14 +311,16 @@ class LookingGlass
             foreach ($pipes as $pipe) {
                 fclose($pipe);
             }
-            // retrieve parent pid
-            $ppid = $status['pid'];
-            // use ps to get all the children of this process
-            $pids = preg_split('/\s+/', `ps -o pid --no-heading --ppid $ppid`);
-            // kill remaining processes
-            foreach($pids as $pid) {
-                if (is_numeric($pid)) {
-                    posix_kill($pid, 9);
+            if ($status['pid']) {
+                // retrieve parent pid
+                //$ppid = $status['pid'];
+                // use ps to get all the children of this process
+                $pids = preg_split('/\s+/', 'ps -o pid --no-heading --ppid '.$status['pid']);
+                // kill remaining processes
+                foreach ($pids as $pid) {
+                    if (is_numeric($pid)) {
+                        posix_kill($pid, 9);
+                    }
                 }
             }
             proc_close($process);
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..96bbc10
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,18 @@
+version: "3.8"
+
+services:
+  nginx:
+    image: hybula/lookingglass-nginx:1
+    build:
+      context: docker/nginx
+      dockerfile: Dockerfile
+    ports:
+      - "80:80"
+    restart: unless-stopped
+
+  php-fpm:
+    image: hybula/lookingglass-php:1
+    build:
+      context: .
+      dockerfile: docker/php-fpm/Dockerfile
+    restart: unless-stopped
\ No newline at end of file
diff --git a/docker/nginx/Dockerfile b/docker/nginx/Dockerfile
new file mode 100644
index 0000000..e06e03e
--- /dev/null
+++ b/docker/nginx/Dockerfile
@@ -0,0 +1,3 @@
+FROM nginx:mainline-alpine
+
+COPY nginx.conf /etc/nginx/nginx.conf
diff --git a/docker/nginx/Dockerfile.dockerignore b/docker/nginx/Dockerfile.dockerignore
new file mode 100644
index 0000000..0595005
--- /dev/null
+++ b/docker/nginx/Dockerfile.dockerignore
@@ -0,0 +1,2 @@
+Dockerfile
+Dockerfile.dockerignore
\ No newline at end of file
diff --git a/docker/nginx/nginx.conf b/docker/nginx/nginx.conf
new file mode 100644
index 0000000..660563d
--- /dev/null
+++ b/docker/nginx/nginx.conf
@@ -0,0 +1,49 @@
+user nginx;
+worker_processes 1;
+
+error_log /dev/stderr warn;
+pid /run/nginx.pid;
+
+events {
+    worker_connections 1024;
+    multi_accept on;
+    use epoll;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+    access_log /dev/stdout combined;
+    sendfile on;
+    tcp_nopush on;
+    tcp_nodelay on;
+    keepalive_timeout 65;
+    types_hash_max_size 2048;
+    client_max_body_size 100m;
+    server_tokens off;
+    gzip on;
+    open_file_cache max=100;
+
+    server {
+        listen 80 default_server;
+        listen [::]:80 default_server;
+        server_name _;
+
+        location / {
+            try_files $uri $uri/ /index.php$is_args$args;
+        }
+
+        location ~ \.php$ {
+            root /var/www/html;
+            fastcgi_split_path_info ^(.+\.php)(/.+)$;
+            fastcgi_pass php-fpm:9000;
+            fastcgi_index index.php;
+            include fastcgi.conf;
+            fastcgi_buffering on;
+            fastcgi_buffer_size 1k;
+            fastcgi_buffers 128 1k;
+            fastcgi_max_temp_file_size 0;
+            gzip off;
+        }
+    }
+}
\ No newline at end of file
diff --git a/docker/php-fpm/Dockerfile b/docker/php-fpm/Dockerfile
new file mode 100644
index 0000000..e24d62f
--- /dev/null
+++ b/docker/php-fpm/Dockerfile
@@ -0,0 +1,8 @@
+FROM php:8.1-fpm-bullseye
+
+RUN apt update && apt install iputils-ping mtr traceroute -y
+
+WORKDIR /var/www/html
+
+COPY . .
+COPY docker/php-fpm/src/config.php config.php
diff --git a/docker/php-fpm/Dockerfile.dockerignore b/docker/php-fpm/Dockerfile.dockerignore
new file mode 100644
index 0000000..1037ac9
--- /dev/null
+++ b/docker/php-fpm/Dockerfile.dockerignore
@@ -0,0 +1,3 @@
+Dockerfile
+Dockerfile.dockerignore
+.git
\ No newline at end of file
diff --git a/index.php b/index.php
index c75b4cd..6999eef 100644
--- a/index.php
+++ b/index.php
@@ -24,9 +24,9 @@ $detectIpAddress = LookingGlass::detectIpAddress();
 
 if (!empty($_POST)) {
     do {
-        if (!isset($_POST['csrfToken']) || ($_POST['csrfToken'] != $_SESSION['CSRF'])) {
+        if (!isset($_POST['csrfToken']) || !isset($_SESSION['CSRF']) || ($_POST['csrfToken'] != $_SESSION['CSRF'])) {
             $errorMessage = 'Missing or incorrect CSRF token.';
-        break;
+            break;
         }
         if (isset($_POST['submitForm'])) {
             if (!in_array($_POST['backendMethod'], LG_METHODS)) {