title: how can I center an image in ionic 2 app
body: <p>hello I have some pages in an ionic 2 app, that have an  inside a .. like this</p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;ion-content padding&gt;
    &lt;p&gt;Some text here....&lt;/p&gt;
    &lt;p&gt;Some other text here...&lt;/p&gt;
    &lt;ion-img width="180" height="180" src="assets/images/goal.jpg"&gt;&lt;/ion-img&gt;  
    &lt;p&gt;bottom text here...&lt;/p&gt;
  &lt;/ion-content&gt;
  </code></pre>
  
  <p>I need to see the image centered horizontally.. I have tested some css but without luck.. how can I achieve that?</p>