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AWS Lambda is a service that runs your code deployed to a container with pre-allocated CPU, disk, and memory. Lambda functions are stateless, with no affinity to the underlying infrastructure, and your code must consider that local resources and processes will not survive the current session. CloudWatch is the built-in tool for Lambda, which organizes logs based on function, version, and containers. It also integrates with Slack, which brings alerting to your Slack account.