diff --git a/.env.dist b/.env.dist
new file mode 100644
index 000000000..0b6b05c67
--- /dev/null
+++ b/.env.dist
@@ -0,0 +1,5 @@
+COMPOSE_FILE=docker/docker-compose.yaml:docker/docker-compose.yaml
+MYSQL_ROOT_PASSWORD=
+MYSQL_DATABASE=
+MYSQL_USER=
+MYSQL_PASSWORD=
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..120c1b6ad
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.env
+vendor
+mysql-data
+.idea
+composer.lock
diff --git a/composer.json b/composer.json
new file mode 100644
index 000000000..c06643eec
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,12 @@
+{
+    "name": "aleksandrdolgov/otus_php_2023",
+    "type": "project",
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        }
+    },
+    "require-dev": {
+        "squizlabs/php_codesniffer": "^3.7"
+    }
+}
diff --git a/docker/docker-compose.yaml b/docker/docker-compose.yaml
new file mode 100644
index 000000000..3ad1585c1
--- /dev/null
+++ b/docker/docker-compose.yaml
@@ -0,0 +1,90 @@
+version: '3'
+
+services:
+    nginx-root:
+        image: nginx:stable-alpine
+        container_name: nginx-root
+        working_dir: /app
+        ports:
+            -   "80:80"
+        networks:
+            - app-network
+        volumes:
+            - ../docker/nginx-root/application.local.conf:/etc/nginx/conf.d/application.local.conf
+
+    nginx-child-1:
+        image: nginx:stable-alpine
+        container_name: nginx-child-1
+        working_dir: /app
+        volumes:
+            - ../docker/nginx-child/application.local.conf:/etc/nginx/conf.d/application.local.conf
+            - ../app:/app
+        networks:
+            - app-network
+
+    nginx-child-2:
+        image: nginx:stable-alpine
+        container_name: nginx-child-2
+        working_dir: /app
+        volumes:
+            - ../docker/nginx-child/application.local.conf:/etc/nginx/conf.d/application.local.conf
+            - ..app:/app
+        networks:
+            - app-network
+
+    nginx-child-3:
+        image: nginx:stable-alpine
+        container_name: nginx-child-3
+        working_dir: /app
+        volumes:
+            - ../docker/nginx-child/application.local.conf:/etc/nginx/conf.d/application.local.conf
+            - ..app:/app
+        networks:
+            - app-network
+
+    memcached:
+        image: memcached:latest
+        ports:
+            - "11211:11211"
+        container_name: app-memcached
+        networks:
+            - app-network
+
+    php-fpm-1:
+        build:
+            context: ./..
+            dockerfile: docker/fpm/Dockerfile
+        container_name: php-fpm-1
+        volumes:
+            - ../:/app
+        working_dir: /app
+        networks:
+            - app-network
+
+    # second php-fpm
+    php-fpm-2:
+        build:
+            context: ./..
+            dockerfile: docker/fpm/Dockerfile
+        container_name: php-fpm-2
+        volumes:
+            - ../:/app
+        working_dir: /app
+        networks:
+            - app-network
+
+    # third php-fpm
+    php-fpm-3:
+        build:
+            context: ./..
+            dockerfile: docker/fpm/Dockerfile
+        container_name: php-fpm-3
+        volumes:
+            - ../:/app
+        working_dir: /app
+        networks:
+            - app-network
+
+networks:
+    app-network:
+        driver: bridge
diff --git a/docker/fpm/Dockerfile b/docker/fpm/Dockerfile
new file mode 100644
index 000000000..8ee90ae19
--- /dev/null
+++ b/docker/fpm/Dockerfile
@@ -0,0 +1,36 @@
+FROM php:8.2-fpm
+
+# ставим необходимые для нормальной работы модули
+ADD https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin/
+
+RUN apt-get update && apt-get install -y \
+   libfreetype6-dev \
+   libjpeg62-turbo-dev \
+	libpng-dev \
+	libonig-dev \
+	libzip-dev \
+   libmemcached11 \
+   zlib1g-dev libssl-dev \
+	libmemcached-dev \
+	libmcrypt-dev \
+   && pecl install mcrypt \
+	&& docker-php-ext-enable mcrypt \
+   && docker-php-ext-install -j$(nproc) iconv mbstring mysqli pdo_mysql zip \
+	&& docker-php-ext-configure gd --with-freetype --with-jpeg \
+   && docker-php-ext-install -j$(nproc) gd \
+	&& chmod +x /usr/local/bin/install-php-extensions  \
+	&& install-php-extensions redis \
+	&& install-php-extensions @composer-2.2.0 \
+	&& install-php-extensions memcached
+
+COPY docker/fpm/php.ini /usr/local/etc/php/conf.d/php-custom.ini
+
+COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer
+
+USER www-data:www-data
+
+COPY composer.json composer.json
+
+RUN composer install
+
+CMD ["php-fpm"]
diff --git a/docker/fpm/php.ini b/docker/fpm/php.ini
new file mode 100644
index 000000000..ed0de8695
--- /dev/null
+++ b/docker/fpm/php.ini
@@ -0,0 +1,2 @@
+session.save_handler = memcache
+session.save_path = "tcp://memcache:11211"
diff --git a/docker/nginx-child/Dockerfile b/docker/nginx-child/Dockerfile
new file mode 100644
index 000000000..6e89f863d
--- /dev/null
+++ b/docker/nginx-child/Dockerfile
@@ -0,0 +1,11 @@
+FROM nginx
+
+COPY ./application.local.conf /etc/nginx/conf.d/application.local.conf
+
+WORKDIR /app
+
+VOLUME /app
+
+EXPOSE 7878
+
+#CMD ["nginx", "-g", "daemon off;"]
diff --git a/docker/nginx-child/application.local.conf b/docker/nginx-child/application.local.conf
new file mode 100644
index 000000000..48e6a48dd
--- /dev/null
+++ b/docker/nginx-child/application.local.conf
@@ -0,0 +1,25 @@
+upstream backend {
+    least_conn;
+    server php-fpm-1:9000;
+    server php-fpm-2:9000;
+    server php-fpm-3:9000;
+}
+
+server {
+    listen 80;
+
+    root /app/public;
+    index index.php index.html;
+
+    location / {
+        try_files $uri $uri/ /index.php?$query_string;
+    }
+
+    # и наконец правило обращения к php-fpm
+    location ~* .php$ {
+        fastcgi_pass backend;
+        try_files $uri = 404;
+        include fastcgi_params;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+    }
+}
diff --git a/docker/nginx-root/Dockerfile b/docker/nginx-root/Dockerfile
new file mode 100644
index 000000000..bbff36fc5
--- /dev/null
+++ b/docker/nginx-root/Dockerfile
@@ -0,0 +1,11 @@
+#FROM nginx
+#
+#COPY ./application.local.conf /etc/nginx/conf.d/application.local.conf
+#
+#WORKDIR /app
+#
+#VOLUME /app
+#
+#EXPOSE 80
+
+#CMD ["nginx", "-g", "daemon off;"]
diff --git a/docker/nginx-root/application.local.conf b/docker/nginx-root/application.local.conf
new file mode 100644
index 000000000..3502e0ecc
--- /dev/null
+++ b/docker/nginx-root/application.local.conf
@@ -0,0 +1,14 @@
+upstream nginx-balancer{
+    server nginx-child-1:80;
+    server nginx-child-2:80;
+    server nginx-child-3:80;
+}
+
+server {
+    listen 80;
+    server_name application.local;
+
+    location / {
+        proxy_pass http://nginx-balancer;
+    }
+}
diff --git a/public/index.php b/public/index.php
new file mode 100644
index 000000000..f4e5ebb20
--- /dev/null
+++ b/public/index.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+use App\AppValidator;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$app = new AppValidator();
+$app->runApp();
diff --git a/src/AppValidator.php b/src/AppValidator.php
new file mode 100644
index 000000000..64f74b80c
--- /dev/null
+++ b/src/AppValidator.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App;
+
+use App\Validators\BracketValidator;
+use Exception;
+
+class AppValidator
+{
+    public function runApp(): void
+    {
+        try {
+            if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+                throw new Exception('Use POST method', 400);
+            }
+
+            $string = $_POST['string'] ?? '';
+
+            if (empty($string)) {
+                throw new Exception('Send me not empty "string" param', 400);
+            }
+
+            if (BracketValidator::validateString($string)) {
+                echo "<h1>This is " . $_SERVER['HOSTNAME'] . "</h1>";
+                echo sprintf('Валидация скобок в строке "<b>%s</b>" прошла успешно', $string);
+                phpinfo();
+            } else {
+                echo sprintf('Строка "<b>%s</b>" не прошла валидацию на скобки', $string);
+            }
+        } catch (Exception $exception) {
+            header("HTTP/1.1 {$exception->getCode()} {$exception->getMessage()}");
+        }
+    }
+}
diff --git a/src/Validators/BracketValidator.php b/src/Validators/BracketValidator.php
new file mode 100644
index 000000000..abd056261
--- /dev/null
+++ b/src/Validators/BracketValidator.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Validators;
+
+class BracketValidator
+{
+    public static function validateString(string $string): bool
+    {
+        if (preg_match('/^(\((?1)*\))*$/', $string)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+}