update README

README.md

@@ -12,27 +12,33 @@ This guide will help you deploy and manage your AWS ServiceCatalog using Infrast
 ## Deployment
 Merges to master will copy these templates to an S3 bucket that is used by [organizations-infra/sceptre/scipool](https://github.com/Sage-Bionetworks-IT/organizations-infra/tree/master/sceptre/scipool) to deploy stacks.
 
-## Development
-Currently there is a manual process for development. The steps are:
-1. Deploy a test service catalog product template to an S3 bucket that has public access.
-2. Reference that template in a template that deploys a product. Examples can be found in the individual
-   [Sceptre templates in org-formation-infra repo](https://github.com/Sage-Bionetworks-IT/organizations-infra/tree/master/sceptre/scipool/config/develop)
-
-Example:
-```yaml
-template:
-  path: "sc-product-ec2-linux-docker.j2"
-stack_name: "my-sc-product-ec2-linux-docker"
-parameters:
-  ProductName: "EC2: Linux Docker"
-sceptre_user_data:
-  # force cloudformation to update stack by setting a random number to the latest product's description
-  ProvisioningArtifactParameters: |
-    - Description: 'Test EC2 docker'
-      Info:
-        LoadTemplateFromURL: 'https://<TEST BUCKET>.s3.amazonaws.com/templates/ec2/sc-ec2-linux-docker.yaml'
-      Name: 'v9.9.9'
-```
+## Develoopment
+
+### Pre-Commit
+As a pre-deployment step we syntatically validate our sceptre and
+cloudformation yaml files with [pre-commit](https://pre-commit.com).
+
+Please install pre-commit, once installed the file validations will
+automatically run on every commit. Alternatively you can manually
+execute the validations by running `pre-commit run --all-files`.
+Please install pre-commit, once installed the file validations will
+automatically run on every commit.
+
+### Functional Testing
+In order to test a change to a template, the template to test needs
+to be uploaded to S3, and then a service catalog product needs to
+be configured to use the test template.
+
+The deploy pipeline will run on branches that begin with `test/`
+and will upload the templates to S3 in a directory named after the
+branch name.
+
+Then a PR can be made to `organizations-infra` to create or update
+a service catalog product that references the test template.
+
+Existing templates can be found in the individual [Sceptre templates in org-formation-infra repo](https://github.com/Sage-Bionetworks-IT/organizations-infra/tree/master/sceptre/scipool/config/develop).
+
+And [here's an example PR](https://github.com/Sage-Bionetworks-IT/organizations-infra/pull/1109/files) to add a new test product.
 
 ### Account and Credentials
 While the templates in this library could be used in any AWS account, Sage Bionetworks is currently deploying to the "scipooldev" and "scipoolprod" account.