updated README

README.md

@@ -0,0 +1,17 @@
+![Java](https://badgen.net/badge/language/Java/green)
+![Java](https://badgen.net/badge/Java/JDK-17/green)
+[![GitHub license](https://badgen.net/github/license/maxwai/adlist-merger)](LICENSE)
+
+# Ad List Merger Tool
+
+Tool to merge a lot of Ad Lists for pihole together while removing duplicates
+
+## Getting Started
+
+The Tool needs a `config.xml` in the appdata folder. An example config file will be created if none
+is present.
+
+### Prerequisites
+
+You will need Java Version 17 or later to make it work. It may work with lower Java versions, but it
+was programmed using the Java 17 JDK.