This script allows to send an html email through smtp with a gmail account 
it's using gmail-send https://github.com/alykoshin/gmail-send

to use it:
1. edit the config.js file
	- copy paste the config-example.js to config.js and edit the values
	- the default file path for the html file is mail.html but you can specify another one
2. create your html file, name it mail.html and put is at the root of the folder
3. yarn run start