Same Lambda can only be invoked in a queue no matter the request side is concurrent or not.
Install
It's a web service running in docker container. You can run a shell script to setup/start the container. Full example file is under example/start-lambda.sh. You need to cover those steps to start the container correctly.
Download docker image
docker pull vreal/lambda-local-go
Create a container from this image. The command is just an example, You can create your own version. The /var/lambdas/main can take multiple -p options to override the yaml template parameters. HostEnv and CacheHost are just example which may not necessary in your own projects. -e AWS_DEFAULT_PROFILE=default is necessary if you are not using default AWS credentials profile.