docs update

README.md

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 # Nodeless payments
 Proof of concept implementation for deploying nodeless sdk as lambda function to AWS. This gives us a REST api with close to zero cost of hosting.
 
-Seed phrase and breez api key are stored encrypted in AWS Parameter store and decrypted when lamba is accessed (a rest call is made). 
 
 Currently implemented endpoints:
 - /send_payment (bolt11)
 - /receive_payment (bolt11)
 - /list_payments
 
-### Deploy 
-Deployment to AWS with [cloudformation](./cloudformation.yaml). Encrypted secrets are stored in [AWS Parameter Store](https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-parameter-store.html) and are accessed each time any endpoint is called (in the background docker container is started for each rest api call).
 
 ### Security:
-- for PoC purposes simple x-api-key header is added to the http calls and verified at each invocation. Api key is stored the same way as 
+- for PoC purposes simple x-api-key header is added to the http calls and verified at each invocation. API secret is stored the same way as seed words and breez api key.
+- Encrypted secrets are stored in [AWS Parameter Store](https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-parameter-store.html) and are accessed each time any endpoint is called (in the background docker container is started for each rest api call).
+
+## Requirements for deployment
+- [AWS cli](https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html)
+- Access to AWS account
+- [Breez nodeless api key](https://breez.technology/request-api-key/#contact-us-form-sdk)
+- 12 word BIP 39 seed
+
+## Deployment 
+Deployment to AWS with [cloudformation](./cloudformation.yaml). 
+
+### Install CLI 
+Follow [AWS guide](https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html) to install and configure cli.
+
+### Create SSM parameters for Breez credentials
+```
+aws ssm put-parameter \
+    --name "/breez/api_key" \
+    --value "<REPLACE_WITH_BREEZ_API_KEY>" \
+    --type SecureString
+
+aws ssm put-parameter \
+    --name "/breez/seed_phrase" \
+    --value "<REPLACE_WITH_SEED_WORDS>" \
+    --type SecureString
+
+aws ssm put-parameter \
+    --name "/breez/api_secret" \
+    --value "<REPLACE_WITH_DESIRED_API_AUTHENTICATION_KEY>" \
+    --type SecureString
+```
+### Deploy Cloudformation stack
+```
+aws cloudformation create-stack \
+    --stack-name breez-integration \
+    --template-body file://cloudformation.yaml \
+    --capabilities CAPABILITY_IAM
+
+# Monitor the stack creation
+aws cloudformation describe-stacks \
+    --stack-name breez-integration \
+    --query 'Stacks[0].StackStatus'
+
+```
+### Retrieve the API endpoints after successful deployment
+
+```
+aws cloudformation describe-stacks \
+    --stack-name breez-integration \
+    --query 'Stacks[0].Outputs'
+
+```