Add AWS deployment docs

docs/deployment-aws.md

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+# Deploying to AWS
+
+
+## Requirements: 
+
+### [mapbox/cfn-config](https://github.com/mapbox/cfn-config)
+
+Follow the prerequisites for installation for the cfn-config tool, then install using npm.
+
+```
+npm install -g @mapbox/cfn-config
+```
+
+**Other Requirements**
+- AWS permissions to access S3 buckets, cloudformation templates, and route53 records
+- AWS Domain and SSL certificate on ACM
+
+### OMK Config bucket
+
+Create an S3 bucket to hold the form data (in this doc we will use `s3://OpenMapKitServer-storage`), and a folder in that bucket called `settings/`. 
+
+## Deploying OMK
+
+`cfn-config` creates a CloudFormation template and manages the deployment to AWS resources. Be sure to give a relevant name to this deployment (aka application stack). We will use `example`. Before deploying, configure the `cloudformation/users.json` file as needed and upload to `s3://OpenMapKitServer-storage/settings/OpenMapKitServer-example/`. Then run the `cfn-config command`:
+
+```
+cfn-config create example cloudformation/OpenMapKitServer.template.js -t <cfn-config-bucket> -c <cfn-config-bucket>
+```
+
+`<cfn-config-bucket>` is the bucket created while installing cfn-config. The tool will prompt the following parameters:
+
+```
+? Saved configurations New configuration
+? GitSha. Repository GitSha: <The Git hash of the most recent version of OMK Server>
+? ELBSubnets. ELB subnets: <A comma-separated string of subnets the EC2 can run on>
+? S3Bucket. S3 bucket: OpenMapKitServer-storage
+? S3Prefix. S3 prefix for the bucket: example
+? OpenMapKitVersion. OpenMapKit Version, to download and extract the frontend: v1.5.1
+? EnableS3Sync. Enable S3 sync: true
+? EnableHTTPS. Enable HTTPS (required to setup the form submission endpoint): true
+? NodeEnvironment. NODE_ENV environment variable: production
+? SSLCertificateIdentifier. SSL certificate for HTTPS protocol: <ACM Certificate ID>
+? UsersS3Bucket. Bucket with login details. Logins are stored at S3://<UsersS3Bucket>/settings/<OMK_stack_name>/users.json: OpenMapKitServer-storage
+? Ready to create the stack? (Y/n) 
+```
+
+When the process is finished, the IP address to access OMK will be found in the EC2 Application Load Balancer console.