Create aws-ebs-setup.md

Breaking AWS EBS install instructions out of single-container instructions

doc/install/aws-ebs-setup.md

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+## AWS Elastic Beanstalk Setup (Docker)
+
+1. Create a new Elastic Beanstalk Docker application using the [Dockerrun.aws.zip](docker/0.6/Dockerrun.aws//Dockerrun.aws.zip) file provided. 
+	1. From the AWS console select Elastic Beanstalk.
+	2. Select "Create New Application" from the top right.
+	3. Name the application and press next.
+	4. Select "Create a web server" environment.
+	5. If asked, select create an IAM role and instance profile and press next.
+	6. For predefined configuration select under Generic: Docker. For environment type select single instance.
+	7. For application source, select upload your own and upload Dockerrun.aws.zip from [Dockerrun.aws.zip](docker/0.6/Dockerrun.aws//Dockerrun.aws.zip). Everything else may be left at default.
+	8. Select an environment name, this is how you will refer to your environment. Make sure the URL is available then press next.
+	9. The options on the additional resources page may be left at default unless you wish to change them. Press Next.
+	10. On the configuration details place. Select an instance type of t2.small or larger.
+	11. You can set the configuration details as you please but they may be left at their defaults. When you are done press next.
+	12. Environment tags my be left blank. Press next.
+	13. You will be asked to review your information. Press Launch.
+
+4. Try it out!
+	14. Wait for beanstalk to update the environment.
+	15. Try it out by entering the domain of the form \*.elasticbeanstalk.com found at the top of the dashboard into your browser. You can also map your own domain if you wish.
+	
+	
+	### (Recommended) Enable Email 
+	The default single-container Docker instance for Mattermost is designed for product evaluation, and sets `ByPassEmail=true` so the product can run without enabling email, when doing so maybe difficult. 
+	
+	To see the product's full functionality, [enabling SMTP email is recommended](doc/config/smtp-email-setup.md).