update readme mention of secrets setup #48

Job	Run time
Staging deployment tests (3.13)	1m 10s
Deploy to Lambda Feedback / Setup	4s
Build Docker Image / Build and Push Docker Image	10m 50s
Deploy to Lambda Feedback / staging-build / Build (staging) & Push on AWS ECR	1m 11s
Deploy to Lambda Feedback / staging-deploy / Deploy (staging)	8s
Deploy to Lambda Feedback / Waiting for approval	5m 0s
Deploy to Lambda Feedback / prod-build / Build (prod) & Push on AWS ECR	1m 42s
Deploy to Lambda Feedback / prod-deploy / Deploy (prod)	8s
	20m 13s

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