Update README.md

Author: evshvarov

README.md

@@ -1,2 +1,23 @@
 # ideal_objectscript
-Ideal simplest objectscript app template for code guidelines and deployment
+Ideal simplest objectscript app template for code guidelines and deployment.
+
+
+# Installation
+
+Go to [Releases](https://github.com/evshvarov/ideal_objectscript/releases), download ideal__.xml file and import it into your InterSystems Data Platform (Caché, Ensemble, IRIS) into the namespace you like.
+
+# How it works
+
+# Hello World
+Open terminal and call HelloWorld() method:
+
+USER>w ##class(Ideal.ObjectScript).HelloWorld()
+Hello World!
+
+# Writing to the device and using class paremeters
+This method write system info and class version to the device. Open terminal and call WriteToDevice() method:
+
+USER>d ##class(Ideal.ObjectScript).WriteToDevice()
+The version of the class: 1.0
+The version of the system: Cache for UNIX (Apple Mac OS X for x86-64)
+