AWS Lambda Deployment Pipeline

Build a deployment pipeline for AWS Lambda functions.

Lambda configuration:
- Runtime: [Node.js/Python/Go/Java]
- Framework: [SAM/Serverless/CDK/raw]
- Number of functions: [count]
- Triggers: [API Gateway/S3/SQS/EventBridge]
- Layers: [shared dependencies]

Pipeline requirements:
1. Local development setup
2. Unit testing
3. Integration testing
4. Package and deploy
5. Environment management (dev/staging/prod)
6. Alias management (canary/blue-green)
7. Rollback capability
8. Monitoring integration

Infrastructure needs:
- IAM roles with least privilege
- VPC configuration (if needed)
- Environment variables and secrets
- Dead letter queues
- Provisioned concurrency
- CloudWatch alarms

Please provide:
- CI/CD pipeline (GitHub Actions/GitLab/Jenkins)
- SAM/Serverless template
- Testing framework setup
- Deployment scripts