Create a post announcing and explaining Kroki usage

_posts/2021/05/2021-05-21-diagrams-from-textual-descriptions.md

@@ -107,7 +107,7 @@ We will use PlantUML to [display the JSON data](https://plantuml.com/json).
 
 At first, we need to tell GitLab that we want to create a diagram using
 PlantUML.
-This is why we create a Markdown code block using PlantUML for Syntax Highlighting.
+This is why we create a Markdown code block using PlantUML for syntax highlighting.
 
     ```plantuml
 
@@ -152,7 +152,7 @@ You will be presented an image as shown below.
 ## What Else Can Be Done?
 The new feature is not limited to using PlantUML.
 The new integration gives you access to more than that.
-It supports [Vega](https://github.com/vega/vega),
+It supports, among others, [Vega](https://github.com/vega/vega),
 [C4 with PlantUML](https://github.com/RicardoNiepel/C4-PlantUML),
 [GraphViz](https://www.graphviz.org/) or
 [BlockDiag](https://github.com/blockdiag/blockdiag).
@@ -459,7 +459,7 @@ Taken from <https://graphviz.org/Gallery/directed/neural-network.html>.
 Taken from <http://blockdiag.com/en/blockdiag/examples.html>.
 
 ## Deployment
-The service is provided by HIFIS Software and hosted entirely on HZDR
+The service is provided by HIFIS Software and is hosted entirely on HZDR
 servers.
 It does not share any data with external providers.
 As usual, the deployment can be reproduced via the corresponding