formatting tweaks

Author: rhuss

README.adoc

@@ -1,13 +1,13 @@
 //pass:[<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="display: block; border-width:0; float: right" align="right" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a>]
-pass:[<a rel="license" href="https://k8spatterns.io"><img alt="Kubernetes Patterns Duck" style="display: block; border-width:0; float: right; margin: 0px 0px 150px 150px;" align="right" src="https://avatars2.githubusercontent.com/u/27804949?s=200&v=4" /></a>]
+pass:[<a rel="license" href="https://k8spatterns.io"><img alt="Kubernetes Patterns" style="display: block; border-width:0; float: right; margin: 0px 0px 150px 150px;" align="right" src="https://github.com/k8spatterns/k8spatterns.io/raw/master/static/images/cover.png" /></a>]
 
 = Kubernetes Patterns - Examples
 
 image:https://i.creativecommons.org/l/by/4.0/88x31.png[Creative Commons License, role="right", link="https://creativecommons.org/licenses/by/4.0/"]
 
 This GitHub project contains the examples from _Kubernetes Patterns - Reusable Elements for Designing Cloud-Native Applications_ http://hyperurl.co/kubernetes-patterns[book] by https://github.com/bibryam[Bilgin Ibryam] and https://github.com/rhuss[Roland Huß]
 
-Installation instructions for the examples' prerequisites are summarised in link:INSTALL.adoc[INSTALL].
+Installation instructions for the example prerequisites are summarised in link:INSTALL.adoc[INSTALL].
 By default, you need access to a vanilla Kubernetes installation, like Minikube.
 If addons are required, the example description explains this additional requirement.