Mod proposals to Kroki post

According to earlier comment:

• try to reduce the hurdle for Gitlab non-natives using easier wording, some basic gitlab intro, link to actual gitlab examples.

To do:

• Easier intro text and links.
• Create Gitlab example project and link to it.
  • make that example public do this in parent branch kroki-post
• clarify post categories/types and show on front page ----> move to extra issue/MR

Review app

_posts/2021/05/2021-05-26-diagrams-from-textual-descriptions.md

@@ -165,18 +165,10 @@ You will be presented an image as shown below.
 
 ![PlantUML JSON example](https://kroki.hzdr.de/plantuml/svg/eNp1kDurAjEQhfv9FSH1IvtQECvv1UrExlIsopnVXHYnkozgg_3vThJWC7lNIN85M-cwc0_K0Z-3mD0zIWRjnKeN6kDOhFzZM8o84FZ96LYzdE5YnQKppumjtQPvGYRNDDw5APp5Y_mrrvRAcGKtULM6EuOiiJvYfTR0D6YluzXggLkfpVh1s3gf8MWy0C6sjlpR1tVUstLHJrZpzBFC5C66Ux8WDlfTaoMnViZllQ_YWdsxKqt6HFGf_ztWf4_VaYbffUzXcOGTdoAUG-yzPpsD6nDjF8HSYBU=)
 
-## 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, 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).
-For a complete list please refer to the official
-[list of supported diagram types and formats](https://kroki.io/#support).
 
-### Gantt Diagram with PlantUML
 
+### Gantt Diagram
+PlantUML also supports Gantt diagrams:
 <details>
   <summary>Show code</summary>
   <div markdown=1>
@@ -204,6 +196,17 @@ For a complete list please refer to the official
 More in-depth information on the Gantt diagram syntax is available in the
 official [PlantUML documentation](https://plantuml.com/de/gantt-diagram).
 
+## 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, 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).
+For a complete list please refer to the official
+[list of supported diagram types and formats](https://kroki.io/#support).
+
+
 ### Vega
 
 <details>