Create a list of 3rd party tutorials

[sobolevn]

There are great articles on the internet about git-secret!

I guess, it would be awesome to list them somewhere in the docs or in wiki pages:

• https://medium.com/@GeorgiosGoniotakis/how-to-keep-your-repositorys-sensitive-data-secure-using-git-secret-c1ddc28cb985
• https://www.digitalocean.com/community/tutorials/an-introduction-to-managing-secrets-safely-with-version-control-systems
• https://embeddedartistry.com/blog/2018/3/15/safely-storing-secrets-in-git
• https://medium.freecodecamp.org/how-to-securely-store-api-keys-4ff3ea19ebda

[joshrabinowitz]

I suggest we list these articles on git-secret.io and in the docs at https://github.com/sobolevn/git-secret/blob/master/man/man7/git-secret.7.ronn