diff --git a/.gitignore b/.gitignore
index 3bf780b60..7c8fdc245 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 .idea
-.env
\ No newline at end of file
+.env
+/vendor/
+code/composer.lock
+code/vendor
diff --git a/code/app/Application.php b/code/app/Application.php
new file mode 100644
index 000000000..34a866752
--- /dev/null
+++ b/code/app/Application.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Dmatrenin\Bracket;
+
+use Exception;
+
+class Application
+{
+    public static function run()
+    {
+        try {
+            http_response_code(200);
+            return Validator::validate($_POST['string']);
+        } catch (Exception $e) {
+            http_response_code($e->getCode());
+            return $e->getMessage();
+        }
+    }
+}
diff --git a/code/app/Validator.php b/code/app/Validator.php
new file mode 100644
index 000000000..316b5ee53
--- /dev/null
+++ b/code/app/Validator.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Dmatrenin\Bracket;
+
+use Exception;
+
+class Validator
+{
+    /**
+     * @throws Exception
+     */
+    public static function validate(string $bracket): string
+    {
+        $counter = 0;
+        $bracket = preg_replace('/[^()]/', '', $bracket);
+
+        if ($bracket === '') {
+            throw new Exception("Пустая строка", 400);
+        }
+
+        foreach (str_split($bracket) as $char) {
+            if ($char === '(') {
+                $counter++;
+            } elseif ($char === ')') {
+                $counter--;
+            }
+
+            if ($counter < 0) {
+                throw new Exception("Не хватает открывающей скобки", 400);
+            }
+        }
+
+        if ($counter > 0) {
+            throw new Exception("Не хватает зактывающей скобки", 400);
+        }
+
+        return $bracket;
+    }
+}
diff --git a/code/composer.json b/code/composer.json
new file mode 100644
index 000000000..b8462c1ad
--- /dev/null
+++ b/code/composer.json
@@ -0,0 +1,15 @@
+{
+    "name": "dmatrenin/bracket",
+    "type": "project",
+    "autoload": {
+        "psr-4": {
+            "Dmatrenin\\Bracket\\": "app"
+        }
+    },
+    "authors": [
+        {
+            "name": "Dmireiy Matrenin"
+        }
+    ],
+    "require": {}
+}
diff --git a/code/public/index.php b/code/public/index.php
new file mode 100644
index 000000000..db049f8c8
--- /dev/null
+++ b/code/public/index.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+use Dmatrenin\Bracket\Application;
+
+require_once "../vendor/autoload.php";
+
+echo Application::run();
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 000000000..c2874564c
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,80 @@
+---
+version: '3.8'
+
+services:
+  balancer:
+    container_name: balancer
+    build:
+      context: docker/balancer
+      dockerfile: Dockerfile
+    ports:
+      - 8080:80
+    networks:
+      - app-network
+    depends_on:
+      - nginx-1
+      - nginx-2
+
+  nginx-1:
+    container_name: nginx-1
+    build:
+      context: docker/nginx
+      dockerfile: Dockerfile
+    image: webserver/nginx
+    volumes:
+      - ./code:/data/application.local
+    networks:
+      - app-network
+    depends_on:
+      - app-1
+      - app-2
+
+  nginx-2:
+    container_name: nginx-2
+    build:
+      context: docker/nginx
+      dockerfile: Dockerfile
+    image: webserver/nginx
+    volumes:
+      - ./code:/data/application.local
+    networks:
+      - app-network
+    depends_on:
+      - app-1
+      - app-2
+
+  app-1: #2.2. php-fpm (соединяется с nginx через unix-сокет)
+    container_name: app-1
+    build:
+      context: docker/fpm
+      dockerfile: Dockerfile
+    image: webserver/app
+    volumes:
+      - ./code:/data/application.local
+    networks:
+      - app-network
+
+  app-2: #2.2. php-fpm (соединяется с nginx через unix-сокет)
+    container_name: app-2
+    build:
+      context: docker/fpm
+      dockerfile: Dockerfile
+    image: webserver/app
+    volumes:
+      - ./code:/data/application.local
+    networks:
+      - app-network
+
+  memcached: #2.4. memcached (соединяется с php по порту)
+    image: memcached
+    container_name: memcached
+    ports:
+      - "11211:11211"
+    networks:
+      - app-network
+
+
+networks:
+  app-network:
+    driver: bridge
+...
diff --git a/docker/balancer/Dockerfile b/docker/balancer/Dockerfile
new file mode 100644
index 000000000..1b1dfc34f
--- /dev/null
+++ b/docker/balancer/Dockerfile
@@ -0,0 +1,7 @@
+FROM nginx:latest
+
+COPY application.local.conf /etc/nginx/conf.d/application.local.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]
\ No newline at end of file
diff --git a/docker/balancer/application.local.conf b/docker/balancer/application.local.conf
new file mode 100644
index 000000000..09fdb78cc
--- /dev/null
+++ b/docker/balancer/application.local.conf
@@ -0,0 +1,20 @@
+upstream balancer {
+    least_conn;
+    server nginx-1;
+    server nginx-2;
+}
+
+server {
+    listen 80;
+    server_name _;
+
+    # restrict methods. Принимаем только POST-запросы
+    if ($request_method !~ ^(POST)$) {
+        return '405';
+    }
+
+    location / {
+        proxy_pass http://balancer;
+        include /etc/nginx/fastcgi_params;
+    }
+}
\ No newline at end of file
diff --git a/docker/fpm/Dockerfile b/docker/fpm/Dockerfile
new file mode 100644
index 000000000..6f4791056
--- /dev/null
+++ b/docker/fpm/Dockerfile
@@ -0,0 +1,22 @@
+FROM php:8.2-fpm
+
+RUN apt-get update && apt-get install -y \
+		libfreetype-dev \
+		libjpeg62-turbo-dev \
+		libpng-dev \
+	&& docker-php-ext-configure gd --with-freetype --with-jpeg \
+	&& docker-php-ext-install -j$(nproc) gd pdo_mysql mysqli \
+	&& pecl install redis memcache \
+	&& docker-php-ext-enable redis memcache \
+    && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* # Освобождаем место от мусора
+
+COPY php.ini /usr/local/etc/conf.d/php-custom.ini
+#COPY zz-docker.conf /usr/local/etc/php-fpm.d/zz-docker.conf
+
+WORKDIR /data
+
+VOLUME /data
+
+CMD ["php-fpm"]
diff --git a/docker/fpm/php.ini b/docker/fpm/php.ini
new file mode 100644
index 000000000..ff806bb1f
--- /dev/null
+++ b/docker/fpm/php.ini
@@ -0,0 +1,2 @@
+session.save_handler = memcache
+session.save_path = "tcp://memcache:11211"
\ No newline at end of file
diff --git a/docker/fpm/zz-docker.conf b/docker/fpm/zz-docker.conf
new file mode 100644
index 000000000..67216474c
--- /dev/null
+++ b/docker/fpm/zz-docker.conf
@@ -0,0 +1,6 @@
+[global]
+daemonize = no
+
+[www]
+listen = /var/run/php-fpm.sock
+listen.mode = 0666
\ No newline at end of file
diff --git a/docker/nginx/Dockerfile b/docker/nginx/Dockerfile
new file mode 100644
index 000000000..c10c3c57a
--- /dev/null
+++ b/docker/nginx/Dockerfile
@@ -0,0 +1,11 @@
+FROM nginx:latest
+
+COPY application.local.conf /etc/nginx/conf.d/application.local.conf
+
+WORKDIR /data
+
+VOLUME /data
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]
diff --git a/docker/nginx/application.local.conf b/docker/nginx/application.local.conf
new file mode 100644
index 000000000..7158390aa
--- /dev/null
+++ b/docker/nginx/application.local.conf
@@ -0,0 +1,30 @@
+upstream apps {
+    least_conn;
+    server app-1:9000;
+    server app-2:9000;
+}
+
+server {
+    listen 80;
+    server_name application.local;
+    root /data/application.local/public;
+    index index.php index.html;
+
+    location ~* .(jpg|jpeg|gif|css|png|js|ico|html)$ {
+        access_log off;
+        expires max;
+    }
+
+    location / {
+        try_files $uri $uri/ /index.php?$query_string;
+    }
+
+    location ~* .php$ {
+        try_files $uri = 404;
+        fastcgi_split_path_info ^(.+.php)(/.+)$;
+        fastcgi_pass apps;
+        fastcgi_index index.php;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        include fastcgi_params;
+    }
+}