Quickstart howto post on Facebook using API

In addition to my Hactkoberfest contribution,

I just created a quickstart for user who wants to use Facebook API to post on a page:

• get page info
• post on a page
• get long-lived access token

cf. https://github.com/boly38/testFB

this project gives you the basis curl commands.

Thanks to dev.to previous contributions that give me some inputs !