Added how to add Custom Checks

README.md

@@ -9,6 +9,7 @@
 - [Screenshots](#screenshots)
 - [Troubleshooting](#troubleshooting)
 - [Extras](#extras)
+- [Add custom checks](#custom checks)
 
 ## Description
 
@@ -593,3 +594,12 @@ or to run just one of the checks, to see if you have S3 buckets open:
 ```
 ./prowler -c extraNUMBER
 ```
+
+## Custom Checks
+
+In order to add any new check feel free to create a new extra check in the extras section.
+To do so, you will need to follow this steps:
+1 - use any existing extra check as reference
+2 - add `ID7N` and `TITLE7N`, where N is a new check number part of the extras section (7) around line 361 `# List of checks IDs and Titles`
+3 - add your new extra check function name at `callCheck` function (around line 1817) and below in that case inside extras option (around line 1853)
+4 - finally add it in `# List only check tittles` around line 1930