diff --git a/.github/workflows/publish-dockerhub.yml b/.github/workflows/publish-dockerhub.yml
new file mode 100644
index 0000000..e30452b
--- /dev/null
+++ b/.github/workflows/publish-dockerhub.yml
@@ -0,0 +1,33 @@
+name: Publish to Docker Hub
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main ]
+    paths:
+      - 'docker/**'
+      - '.github/workflows/**'
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/setup-qemu-action@v3
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build & Push WEB
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: docker/Dockerfile.web
+          push: true
+          tags: jcabo65/php-sample-web:latest
+      - name: Build & Push DB
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: docker/Dockerfile.db
+          push: true
+          tags: jcabo65/php-sample-db:latest
diff --git a/composer.json b/composer.json
index a164f98..5de3161 100644
--- a/composer.json
+++ b/composer.json
@@ -2,5 +2,10 @@
     "require": {
         "willdurand/negotiation": "^2.2",
         "twbs/bootstrap": "^3.3"
+    },
+    "autoload": {
+        "psr-4": {
+            "": "src/"
+        }
     }
 }
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..bfbaab1
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,130 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "6226c4e050e2b55576c081b6dd9120d0",
+    "packages": [
+        {
+            "name": "twbs/bootstrap",
+            "version": "v3.4.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/twbs/bootstrap.git",
+                "reference": "68b0d231a13201eb14acd3dc84e51543d16e5f7e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/twbs/bootstrap/zipball/68b0d231a13201eb14acd3dc84e51543d16e5f7e",
+                "reference": "68b0d231a13201eb14acd3dc84e51543d16e5f7e",
+                "shasum": ""
+            },
+            "replace": {
+                "twitter/bootstrap": "self.version"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.4.x-dev"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jacob Thornton",
+                    "email": "jacobthornton@gmail.com"
+                },
+                {
+                    "name": "Mark Otto",
+                    "email": "markdotto@gmail.com"
+                }
+            ],
+            "description": "The most popular front-end framework for developing responsive, mobile first projects on the web.",
+            "homepage": "https://getbootstrap.com/",
+            "keywords": [
+                "JS",
+                "css",
+                "framework",
+                "front-end",
+                "less",
+                "mobile-first",
+                "responsive",
+                "web"
+            ],
+            "support": {
+                "issues": "https://github.com/twbs/bootstrap/issues",
+                "source": "https://github.com/twbs/bootstrap/tree/v3.4.1"
+            },
+            "time": "2019-02-13T15:55:38+00:00"
+        },
+        {
+            "name": "willdurand/negotiation",
+            "version": "v2.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/willdurand/Negotiation.git",
+                "reference": "03436ededa67c6e83b9b12defac15384cb399dc9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/willdurand/Negotiation/zipball/03436ededa67c6e83b9b12defac15384cb399dc9",
+                "reference": "03436ededa67c6e83b9b12defac15384cb399dc9",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Negotiation\\": "src/Negotiation"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "William Durand",
+                    "email": "will+git@drnd.me"
+                }
+            ],
+            "description": "Content Negotiation tools for PHP provided as a standalone library.",
+            "homepage": "http://williamdurand.fr/Negotiation/",
+            "keywords": [
+                "accept",
+                "content",
+                "format",
+                "header",
+                "negotiation"
+            ],
+            "support": {
+                "issues": "https://github.com/willdurand/Negotiation/issues",
+                "source": "https://github.com/willdurand/Negotiation/tree/2.x"
+            },
+            "time": "2017-05-14T17:21:12+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": [],
+    "plugin-api-version": "2.6.0"
+}
diff --git a/docker/Dockerfile.db b/docker/Dockerfile.db
new file mode 100644
index 0000000..2d82bac
--- /dev/null
+++ b/docker/Dockerfile.db
@@ -0,0 +1,8 @@
+FROM mariadb:10.3
+
+COPY sql/db.sql /docker-entrypoint-initdb.d/
+
+ENV MYSQL_ROOT_PASSWORD=rootpass \
+    MYSQL_DATABASE=sample \
+    MYSQL_USER=sampleuser \
+    MYSQL_PASSWORD=samplepass
diff --git a/docker/Dockerfile.web b/docker/Dockerfile.web
new file mode 100644
index 0000000..a27e374
--- /dev/null
+++ b/docker/Dockerfile.web
@@ -0,0 +1,35 @@
+FROM php:7.4-apache
+
+# Forzar actualización de fuentes APT
+RUN apt-get update -o Acquire::Check-Valid-Until=false -o Acquire::Check-Date=false || { sleep 10; apt-get update -o Acquire::Check-Valid-Until=false -o Acquire::Check-Date=false; }
+
+# Instalar dependencias y Composer
+RUN apt-get install -y wget unzip libzip-dev vim-tiny
+RUN docker-php-ext-install pdo pdo_mysql zip
+RUN apt-get clean && rm -rf /var/lib/apt/lists/*
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+WORKDIR /var/www/html
+COPY . .
+
+# Instalar dependencias de Composer
+RUN composer install --no-scripts --no-interaction
+
+# Ajustar permisos y enlaces
+RUN chown -R www-data:www-data /var/www/html/web /var/www/html/vendor || { echo "Error ajustando permisos"; exit 1; } \
+    && chmod -R 755 /var/www/html/web /var/www/html/vendor \
+    && ln -sf /var/www/html/vendor/twbs/bootstrap/dist/fonts/ /var/www/html/web/fonts
+
+RUN a2enmod rewrite \
+    && echo '<VirtualHost *:80>\n    ServerName localhost\n    DocumentRoot /var/www/html/web\n    <Directory /var/www/html/web>\n        Options Indexes FollowSymLinks\n        AllowOverride All\n        Require all granted\n    </Directory>\n    ErrorLog ${APACHE_LOG_DIR}/error.log\n    CustomLog ${APACHE_LOG_DIR}/access.log combined\n</VirtualHost>' > /etc/apache2/sites-available/000-default.conf \
+    && a2ensite 000-default.conf \
+    && sed -i 's/LogLevel warn/LogLevel debug/g' /etc/apache2/apache2.conf \
+    && apache2ctl configtest \
+    && apache2ctl restart
+
+EXPOSE 80
+
+ENV DB_HOST=mariadb \
+    DB_NAME=sample \
+    DB_USER=sampleuser \
+    DB_PASS=samplepass
\ No newline at end of file
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
new file mode 100644
index 0000000..cc8018b
--- /dev/null
+++ b/docker/docker-compose.yml
@@ -0,0 +1,33 @@
+version: '3.8'
+
+services:
+  web:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.web
+    image: tuusuario/php-sample-web:latest
+    ports:
+      - "8080:80"
+    depends_on:
+      - db
+    environment:
+      - DB_HOST=db
+      - DB_NAME=sample
+      - DB_USER=sampleuser
+      - DB_PASS=samplepass
+
+  db:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.db
+    image: tuusuario/php-sample-db:latest
+    environment:
+      MYSQL_ROOT_PASSWORD: rootpass
+      MYSQL_DATABASE: sample
+      MYSQL_USER: sampleuser
+      MYSQL_PASSWORD: samplepass
+    volumes:
+      - db_data:/var/lib/mysql
+
+volumes:
+  db_data:
diff --git a/web/README-ITEM2-DOCKER.md b/web/README-ITEM2-DOCKER.md
new file mode 100644
index 0000000..0e4e315
--- /dev/null
+++ b/web/README-ITEM2-DOCKER.md
@@ -0,0 +1,22 @@
+# Item 2 – Application Containerization (Docker)
+
+Este documento complementa el README original **sin modificar el código fuente**.  
+Se publican dos imágenes en Docker Hub y se provee `docker-compose` para ejecutar la app.
+
+## Imágenes públicas
+- Web: https://hub.docker.com/r/jcabo65/php-sample-web
+- DB:  https://hub.docker.com/r/jcabo65/php-sample-db
+
+## Archivos relevantes en este repo
+- `docker/Dockerfile.web` – imagen PHP/Apache de la aplicación.
+- `docker/Dockerfile.db`  – imagen de base (MariaDB).
+- `docker/docker-compose.yml` – orquesta `web` y `db` usando **las imágenes públicas**.
+- `docker/docker-compose.override.yml` – comparte `/var/run/mysqld` para que la app (que usa `host=localhost`) conecte por **socket** sin cambiar código.
+
+## Requisitos
+- Docker + Docker Compose.
+
+## Cómo ejecutar (2 líneas)
+```bash
+docker compose -f docker/docker-compose.yml -f docker/docker-compose.override.yml up -d
+# abrir http://localhost:8080
diff --git a/web/autoloader.php b/web/autoloader.php
new file mode 100644
index 0000000..9f8b565
--- /dev/null
+++ b/web/autoloader.php
@@ -0,0 +1 @@
+spl_autoload_register(function ($className) { if (stream_resolve_include_path($file = ("../src/" . str_replace("\\", "/", $className) . ".php"))) { include $file; } });
diff --git a/web/bootstrap.php b/web/bootstrap.php
new file mode 100644
index 0000000..ba554f7
--- /dev/null
+++ b/web/bootstrap.php
@@ -0,0 +1,4 @@
+<?php
+
+require "autoloader.php";
+require "error_handler.php";
diff --git a/web/error_handler.php b/web/error_handler.php
new file mode 100644
index 0000000..64b772f
--- /dev/null
+++ b/web/error_handler.php
@@ -0,0 +1,19 @@
+<?php
+
+set_error_handler(
+    function ($errno, $errstr, $errfile = null, $errline = null, $errcontext = [])
+    {
+        header($_SERVER["SERVER_PROTOCOL"] . " 500 Internal Server Error", true, 500);
+        $dateTime = new DateTime();
+        file_put_contents(__DIR__ . "/logs/error.log", "[{$dateTime->format("c")}] [$errno] $errstr in $errfile on line $errline\n", FILE_APPEND | LOCK_EX);
+    }
+);
+
+set_exception_handler(
+    function ($exception)
+    {
+        header($_SERVER["SERVER_PROTOCOL"] . " 500 Internal Server Error", true, 500);
+        $dateTime = new DateTime();
+        file_put_contents(__DIR__ . "/logs/error.log", "[{$dateTime->format("c")}] " . $exception->getMessage() . "\n", FILE_APPEND | LOCK_EX);
+    }
+);