update readme with dist creation instructions

Author: wleepang

README.md

@@ -4,6 +4,51 @@
 
 This repository is the source code for [Genomics Workflows on AWS](https://docs.opendata.aws/genomics-workflows).  It contains markdown documents that are used to build the site as well as source code (CloudFormation templates, scripts, etc) that can be used to deploy AWS infrastructure for running genomics workflows.
 
+If you want to get the latest version of these solutions up and running quickly, it is recommended that you deploy stacks using the launch buttons available via the [hosted guide](https://docs.opendata.aws/genomics-workflows).
+
+If you want to customize these solutions, you can create your own distribution using the instructions below.
+
+## Creating your own distribution
+
+Clone the repo
+
+```bash
+git clone https://github.com/aws-samples/aws-genomics-workflows.git
+```
+
+Create an S3 bucket in your AWS account to use for the distribution deployment
+
+```bash
+aws s3 mb <dist-bucketname>
+```
+
+Create and deploy a distribution from source
+
+```bash
+cd aws-genomics-workflows
+bash _scripts/deploy.sh --asset-bucket s3://<dist-bucketname> test
+```
+
+This will create a `dist` folder in the root of the project with subfolders `dist/artifacts` and `dist/templates` that will be uploaded to the S3 bucket you created above.
+
+You can now use your deployed distribution to launch stacks using the AWS CLI. For example, to launch the GWFCore stack:
+
+```bash
+TEMPLATE_ROOT_URL=https://<dist-bucketname>.s3-<region>.amazonaws.com/test/templates
+
+aws cloudformation create-stack \
+    --region <region> \
+    --stack-name <stackname> \
+    --template-url $TEMPLATE_ROOT_URL/gwfcore-root.template.yaml \
+    --capabilities CAPABILITY_IAM CAPABILITY_AUTO_EXPAND \
+    --parameters \
+        ParameterKey=VpcId,ParameterValue=<vpc-id> \
+        ParameterKey=SubnetIds,ParameterValue=\"<subnet-id-1>,<subnet-id-2>,...\" \
+        ParameterKey=ArtifactBucketName,ParameterValue=<dist-bucketname> \
+        ParameterKey=TemplateRootUrl,ParameterValue=$TEMPLATE_ROOT_URL
+
+```
+
 ## Building the documentation
 
 The documentation is built using mkdocs.