add enviroment mysql code example

Example: add mysql to path

For windows users only!
I had a lot of trouble for this one, but I found the solution.
Visit this page: https://overiq.com/installing-mysql-windows-linux-and-mac/

And then follow the steps, but instead of putting this (in step 5):
C:\Program Files\MySQL\MySQL Server x.y\bin\mysql.exe

Put this:
C:\Program Files\MySQL\MySQL Server x.y\bin