Update README.md

Author: maybeec

README.md

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-# tutorial-compiler
+**Tutorial Compiler**
+
+This project intends to provide a markdown based language to specify tutorials, which can be cross-compiled to Katacoda, custom text format, and automated tests for continuous quality assurance of the tutorials.
+
+To download and setup the tutorial-compiler use the description in the setup section.<br/>
+[Setup](https://github.com/devonfw-forge/tutorial-compiler/wiki/Setup)
+
+If you want to implement your own tutorials the Development section may help you.<br/>
+[Development](https://github.com/devonfw-forge/tutorial-compiler/wiki/Development)
+
+You find a list of functions which are already implemented in the Functions section.<br/>
+[Functions](https://github.com/devonfw-forge/tutorial-compiler/wiki/Functions)
+