add image illustration in logger page

Author: zamronypj

assets/images/logger.jpg

@@ -6,6 +6,10 @@ description: How to use loggers in Fano Framework
 
 ## Logger and why should you care?
 
+![Logger illustration](/assets/images/logger.jpg){:class="image fit"}
+
+Photo by [Aaron Burden](https://unsplash.com/@aaronburden?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/s/photos/writing?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText)
+
 There are times when developers need to log something to keep track of things, e.g,
 what went wrong (a.k.a error logs), auditing purpose and so on.