Sync devel to master (#215)

* Add a couple of exercises

Also fixed the link for kubernetes exercises.

* Fix kubernetes images

Also fixed the link to containers exercises.

README.md

@@ -62,7 +62,7 @@
   </tr>
   <tr>
     <td align="center"><a href="#certificates"><img src="images/certificates.png" width="75px;" height="75px;" alt="Certificates"/><br /><b>Certificates</b></a></td>
-    <td align="center"><a href="#containers"><img src="images/containers.png" width="70px;" height="75px;" alt="Containers"/><br /><b>Containers</b></a></td>
+    <td align="center"><a href="exercises/containers/README.md"><img src="images/containers.png" width="70px;" height="75px;" alt="Containers"/><br /><b>Containers</b></a></td>
     <td align="center"><a href="#sql"><img src="images/sql.png" width="75px;" height="75px;" alt="sql"/><br /><b>SQL</b></a></td>
     <td align="center"><a href="exercises/openshift/README.md"><img src="images/openshift.png" width="75px;" height="75px;" alt="OpenShift"/><br /><b>OpenShift</b></a></td>
     <td align="center"><a href="#storage"><img src="images/storage.png" width="75px;" height="75px;" alt="Storage"/><br /><b>Storage</b></a></td>

exercises/kubernetes/README.md

@@ -137,9 +137,9 @@ False. A Kubernetes cluster consists of at least 1 master and can have 0 workers
 
 <details>
 <summary>Place the components on the right side of the image in the right place in the drawing<br>
-<img src="images/kubernetes/kubernetes_components.png" height="300px" width="300px"/>
+<img src="images/kubernetes_components.png"/>
 </summary><br><b>
-<img src="images/kubernetes/kubernetes_components_solution.png" height="300px" width="300px"/>
+<img src="images/kubernetes_components_solution.png"/>
 </b></details>
 
 <details>