Images (and text) can be aligned by using div tags. When marking up text inside div tags, be sure to use the proper markup techniques for bolding/italicizing/etc. (they should be inside inequality signs) if you want them to work.
Here’s an example of right alignment for text:
With images, you’ll have to use the HTML img tag to be able to center them with div tags. Here’s an example of center alignment for an image:
<div align=center><img src="https://smartly-dressed-games.s3-us-west-2.amazonaws.com/original/2X/b/b7dc4fb23a539e4c51c4f45e5c1be85986f1bab3.png"></div>