Front page with page content and articles

Hi there,
I’m trying to build a front page for a corporate website, on which I want to put a introduction text, plus last 3 articles published.

So, I created a front page specific page model, based on single.php, and where I inserted the following code :

<ul>
            <?php
                $args = array( 'numberposts' => '1', 'post_status'=> 'publish' );
                $recent_posts = wp_get_recent_posts( $args );
                    foreach( $recent_posts as $recent ){
                            echo
                           '
                           <h2>
                                <a href="'.get_permalink($recent["ID"]).'"
                                   title="'.esc_attr($recent["post_title"]).'"
                                >'.$recent["post_title"].'
                                </a>
                           </h2>
                           '
                           .get_the_excerpt($recent["ID"]);
                    }
            ?>
        </ul>

Now the point is that this function returns the content of the page article in place of the first post.

How can I prevent this ? Is there a solution to filter pages from posts ?

Thanks.