Add What you should know as a founder of a software company

Hi! This is a guide for the developers who want to start their own business.

README.md

@@ -124,6 +124,7 @@ But knowing the stuff will help you become better! :muscle:*
 - :fire: [Everything you need to know to get the job](https://github.com/kdn251/interviews)
 - :book: [Tech Interview Handbook](https://github.com/yangshun/tech-interview-handbook)
 - :page_facing_up: [Teach Yourself Programming in Ten Years](http://norvig.com/21-days.html)
+- :page_facing_up: [What you should know as a founder of a software company](https://qotoqot.com/blog/founder-skills/)
 
 
 ### UX/Usability