Add documentation

README.md

@@ -3,6 +3,9 @@
 Collection of database clients for demo and training purposes.
 Please feed back improvements and fixes via pull request.
 
+## Documentation
+[Getting started with the project](doc/setup/gradle-ide.md)
+
 
 ## License
    Copyright 2022 OST - Ostschweizer Fachhochschule (kuan)

doc/setup/gradle-ide.md

+# Getting started
+## Run a build with gradle
+In the project root, there is a **gradlew** shell script. The **gradlew.bat** is for Windows.
+The script runs the gradle wrapper program, which is included in the project. So there
+is no local gradle installation needed. To run the wrapper, a Java Development Kit
+version 8 or higher is needed. The installed version can be checked by running
+`java --version` in your shell.
+
+A build is run when the script is run either in the PowerShell or bash.
+The picture below shows a run in the Windows PowerShell.
+![powerShellGradle.png](../blob/powerShellGradle.png "powerShellGradle.png")
+
+
+## Open the project in an IDE
+The project can be opened in any IDE. It makes sense to choose an IDE which supports Gradle.
+IntelliJ IDEA Community is recommended. It can be downloaded using the following link:
+*https://www.jetbrains.com/idea/download*
+
+![projectOpenedInIDEA.png](../blob/projectOpenedInIDEA.png "projectOpenedInIDEA.png")