// Set up a redis container
@ClassRule
public static GenericContainerRule redis = new GenericContainerRule("redis:3.0.2")
                                        .withExposedPorts(6379);


// Set up a plain OS container and customize environment, command and exposed ports. This just listens on port 80 and always returns '42'
@ClassRule
public static GenericContainerRule alpine = new GenericContainerRule("alpine:3.2")
                                               .withExposedPorts(80)
                                               .withEnv("MAGIC_NUMBER", "42")
                                               .withCommand("/bin/sh", "-c", "while true; do echo \"$MAGIC_NUMBER\" | nc -l -p 80; done");