Update README.md

Author: mkgeeky

README.md

@@ -1,3 +1,14 @@
 ## Piggiee CVR API
 
-[Piggiee](https://piggiee.dk) want to extract all companies from CVR and insert them into their own system.
+[Piggiee](https://piggiee.dk) want to extract all companies from Danish CVR and insert them into their own system.
+
+## Requirements
+* PHP
+* SQL database
+* cvr.dev API Key
+* Mapbox API Key
+* CVR numbers from https://datacvr.virk.dk/
+
+## How to use
+* Rename `Class/Config_Sample.php` to `Config.php` and update with your information
+* Run `php run.php` and see what happen 💪