Compile with the following parameters:
GOARCH=arm64 GOOS=linux go build -tags lambda.norpc -o bootstrap main.goThe Amazon Linux 2023 and Amazon Linux 2 OS-only runtimes require the executable to be called bootstrap. Also, they do not feature an RPC client like the go1.x runtime did. So, the lambda.norpc tag specifices that the compiler not include the RPC component from the aws-lambda-go package. This decreases the compiled binary size and improves performance.
You can read more on James Beswick's AWS blog for Migrating AWS Lambda functions from the Go1.x runtime to the custom runtime on Amazon Linux.