Update README.md

README.md

@@ -1,5 +1,39 @@
 # Takari Smart Builder
 
+## Set it up
+
+with latest Maven 3.9.x line setting it up is simple.
+
+Create in project root a file `.mvn/extensions.xml` with following content:
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<extensions>
+    <extension>
+        <groupId>io.takari.maven</groupId>
+        <artifactId>takari-smart-builder</artifactId>
+        <version>0.6.3</version>
+    </extension>
+</extensions>
+```
+
+This will make Maven load the Smart Builder extension (will resolve it first time). Then
+to use it, do this:
+
+```
+$ mvn -b smart -T2C
+```
+
+Or alternatively, create `.mvn/maven.config` file (and place each configuration on separate line):
+
+```
+-b smart
+-T2C
+```
+
+And that it is.
+
+## About
 
 The Takari Smart Builder is a replacement scheduling projects builds in a Maven multi-module build. 
 
@@ -13,4 +47,4 @@ persistence and critical path scheduling.
 
 [1]: http://salesforce.com
 [2]: 4Hagras.pdf
-[3]: https://github.com/takari/takari-local-repository
+[3]: https://github.com/takari/takari-local-repository