Updated Wordpress tutorial

The new tutorial now uses official Wordpress Docker Image.

Signed-off-by: Sanyam Kapoor <1sanyamkapoor@gmail.com>

docs/wordpress.md

@@ -22,7 +22,7 @@ with Docker containers. This quick-start guide demonstrates how to use Compose t
 
     You can name the directory something easy for you to remember. This directory is the context for your application image. The directory should only contain resources to build that image.
 
-    This project directory will contain a `Dockerfile`, a `docker-compose.yaml` file, along with a downloaded `wordpress` directory and a custom `wp-config.php`, all of which you will create in the following steps.
+    This project directory will contain a `docker-compose.yaml` file which will be complete in itself for a good starter wordpress project.
 
 2. Change directories into your project directory.
 
@@ -30,113 +30,50 @@ with Docker containers. This quick-start guide demonstrates how to use Compose t
 
         $ cd my-wordpress/
 
-3. Create a `Dockerfile`, a file that defines the environment in which your application will run.
+3. Create a `docker-compose.yml` file that will start your `Wordpress` blog and a separate `MySQL` instance with a volume mount for data persistence:
-
-    For more information on how to write Dockerfiles, see the [Docker Engine user guide](https://docs.docker.com/engine/userguide/dockerimages/#building-an-image-from-a-dockerfile) and the [Dockerfile reference](https://docs.docker.com/engine/reference/builder/).
-
-    In this case, your Dockerfile should include these two lines:
-
-        FROM php:5.6-fpm
-        RUN docker-php-ext-install mysql
-        ADD . /code
-        CMD php -S 0.0.0.0:8000 -t /code/wordpress/
-
-    This tells the Docker Engine daemon how to build an image defining a container that contains PHP and WordPress.
-
-4. Create a `docker-compose.yml` file that will start your web service and a separate MySQL instance:
 
         version: '2'
         services:
-          web:
-            build: .
-            ports:
-              - "8000:8000"
-            depends_on:
-              - db
-            volumes:
-              - .:/code
           db:
-            image: mysql
+            image: mysql:5.7
+            volumes:
+              - "./.data/db:/var/lib/mysql"
+            restart: always
             environment:
               MYSQL_ROOT_PASSWORD: wordpress
               MYSQL_DATABASE: wordpress
               MYSQL_USER: wordpress
               MYSQL_PASSWORD: wordpress
 
-5. Download WordPress into the current directory:
+          wordpress:
+            depends_on:
+              - db
+            image: wordpress:latest
+            links:
+              - db
+            ports:
+              - "8000:80"
+            restart: always
+            environment:
+              WORDPRESS_DB_HOST: db:3306
+              WORDPRESS_DB_PASSWORD: wordpress
 
-        $ curl https://wordpress.org/latest.tar.gz | tar -xvzf -
+    **NOTE**: The folder `./.data/db` will be automatically created in the project directory
-
+    alongside the `docker-compose.yml` which will persist any updates made by wordpress to the
-    This creates a directory called `wordpress` in your project directory.
+    database.
-
-6. Create a `wp-config.php` file within the `wordpress` directory.
-
-    A supporting file is needed to get this working. At the top level of the wordpress directory, add a new file called `wp-config.php` as shown. This is the standard WordPress config file with a single change to point the database configuration at the `db` container:
-
-        <?php
-        define('DB_NAME', 'wordpress');
-        define('DB_USER', 'wordpress');
-        define('DB_PASSWORD', 'wordpress');
-        define('DB_HOST', "db:3306");
-        define('DB_CHARSET', 'utf8');
-        define('DB_COLLATE', '');
-
-        define('AUTH_KEY',         'put your unique phrase here');
-        define('SECURE_AUTH_KEY',  'put your unique phrase here');
-        define('LOGGED_IN_KEY',    'put your unique phrase here');
-        define('NONCE_KEY',        'put your unique phrase here');
-        define('AUTH_SALT',        'put your unique phrase here');
-        define('SECURE_AUTH_SALT', 'put your unique phrase here');
-        define('LOGGED_IN_SALT',   'put your unique phrase here');
-        define('NONCE_SALT',       'put your unique phrase here');
-
-        $table_prefix  = 'wp_';
-        define('WPLANG', '');
-        define('WP_DEBUG', false);
-
-        if ( !defined('ABSPATH') )
-          define('ABSPATH', dirname(__FILE__) . '/');
-
-        require_once(ABSPATH . 'wp-settings.php');
-        ?>
-
-7. Verify the contents and structure of your project directory.
-<!--
-        Dockerfile
-        docker-compose.yaml
-        wordpress/
-          index.php
-          license.txt
-          readme.html
-          wp-activate.php
-          wp-admin/
-          wp-blog-header.php
-          wp-comments-post.php
-          wp-config-sample.php
-          wp-config.php
-          wp-content/
-          wp-cron.php
-          wp-includes/
-          wp-links-opml.php
-          wp-load.php
-          wp-login.php
-          wp-mail.php
-          wp-settings.php
-          wp-signup.php
-          wp-trackback.php
-          xmlrpc.php
-      -->
-
-    ![WordPress files](images/wordpress-files.png)
 
 ### Build the project
 
-With those four new files in place, run `docker-compose up` from your project directory. This will pull and build the needed images, and then start the web and database containers.
+Now, run `docker-compose up -d` from your project directory. This will pull the needed images, and then start the wordpress and database containers.
 
 If you're using [Docker Machine](https://docs.docker.com/machine/), then `docker-machine ip MACHINE_VM` gives you the machine address and you can open `http://MACHINE_VM_IP:8000` in a browser.
 
 At this point, WordPress should be running on port `8000` of your Docker Host, and you can complete the "famous five-minute installation" as a WordPress administrator.
 
+**NOTE**: The Wordpress site will not be immediately available on port `8000` because
+the containers are still being initialized and may take a couple of minutes before the
+first load.
+
 ![Choose language for WordPress install](images/wordpress-lang.png)
 
 ![WordPress Welcome](images/wordpress-welcome.png)