update README

README.md

@@ -3,7 +3,7 @@
 
 ## Instructions
 
-1. Ensure you are authenticated to your AWS account
+1. Ensure you are authenticated to your AWS account and have mysql installed on your command line
 
 2. Clone the Repository
 
@@ -15,4 +15,12 @@
 
 6. Check the configuration and confirm the infrastructure before typing 'yes'
 
-7. The process will fail with errors. If the errors are all related to AppRunner, then the process has succeeded. It is now necessary to push a container image to the ECR repository with the correct database url attached.
+7. The process will fail with errors. If the errors are all related to AppRunner, then the process has succeeded.
+
+8. It is now necessary to push a container image to the ECR repository with the correct database url attached. To do so, change the `[ENV]_DATABASE_URL` secret in the app's Github Actions secret to a string of the form:
+
+`mysql://admin:password@shared-rds-instance.c9o06ok6uz10.us-east-1.rds.amazonaws.com:3306/announcements_qa`
+
+Replace the URL in the middle with the proper endpoint of your database and replace "announcements" with your app name and "qa" with the environment name.
+
+9. Commit a change to the `stages/dev` branch of the app repository so Github Actions can send the container image to ECR where App Runner will pull it from.