Update README.md

README.md

 # elk-hole
 
 ## elasticsearch, logstash and kibana configuration for pi-hole visualization
+
+### show, search, filter and customize pi-hole statistics ... the elk way
+
+requirements:
+
+working installation of the elk stack - refer to https://www.elastic.co/ for details.
+
+this repo provides the relevant files for getting the pi-hole logs via filebeat directly to logstash, sending them to elasticsearch and finally visualize it in kibana
+
+The result will look like this:
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+<SCREENSHOT TODO>
+  
+  
+