Bash trap and cleanup Docker

docker.sh

#!/usr/bin/env bash
set -xeuo pipefail

# Docker use is only as an example, this is just to demonstrate cleanup

function cleanup()
{
    echo "Removing containers..."
    docker rm -f echo
}

trap cleanup EXIT

docker run -d --name echo -p 3123:80 ealen/echo-server:0.9.2

sleep 1s

test $(curl -s -o /dev/null --write-out "%{http_code}" http://localhost:3123) -eq 200
exit $?