🔢 Add port numbers on DockerCoins diagram

... And convert it to PNG because it looks a bit nicer that way

slides/images/dockercoins-diagram.xml

@@ -1 +1 @@
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slides/k8s/kubercoins.md

@@ -133,7 +133,7 @@ Without further ado, let's start this application!
 
 class: pic
 
-![Diagram showing the 5 containers of the applications](images/dockercoins-diagram.svg)
+![Diagram showing the 5 containers of the applications](images/dockercoins-diagram.png)
 
 ---
 

slides/k8s/scalingdockercoins.md

@@ -6,7 +6,7 @@
 
 - Let's look at the architecture again:
 
-  ![DockerCoins architecture](images/dockercoins-diagram.svg)
+  ![DockerCoins architecture](images/dockercoins-diagram.png)
 
 - The loop is done in the worker;
   perhaps we could try adding more workers?

slides/shared/sampleapp.md

@@ -122,7 +122,7 @@ and displays aggregated logs.
 
 class: pic
 
-![Diagram showing the 5 containers of the applications](images/dockercoins-diagram.svg)
+![Diagram showing the 5 containers of the applications](images/dockercoins-diagram.png)
 
 ---