little more info for AWS beanstalk would be very appreciated

[mihai-satmarean]

Dear mattermost Team, I am a big fan since versions 0.x. Great job with the software.
I lost touch a bit in the last year, now I would like to install on AWS Beanstalk, where I am a noob.
please help us by providing critical hints on what needs to be adjusted in the config file.
https://github.com/mattermost/mattermost-docker/blob/master/contrib/aws/README.md
Thank you!

[coltoneshaw]

@mihai-satmarean - Check out the docs here for a rough guide on this.