Added link to Test Suite (hetzneronline#256)

hetzneronline#85

README.md

@@ -13,6 +13,11 @@ Please read the [Contribution Guidelines](./contributing.md)
 If you would like to make a contribution, please follow the instructions in the Contribution Guidelines and then open a Pull Request. One of the Community Managers will then evaluate your tutorial, and provide you with feedback.
 
 
+## Writing and Testing your Content 
+
+There is a Editor/Preview Suite you can use to write your Articles (optional)
+https://community.hetzner.com/markdown-test-suite/
+
 ## Requesting Content
 
 If you cannot find what you are looking for or need help with a specific Tutorial, feel free to open a new [issue](https://github.com/hetzneronline/community-content/issues) here to start a discussion. You may also join the [Hetzner Forum](https://forum.hetzner.com) to ask other developers, operators, and the Hetzner Online Team.