Chirpstack Docker Mqtt

Hi everyone,
I’m trying to get certificate in order to use MQTT integration.
Following the step in the link below for docker I stop on the first command , that is:

make set-hosts.

I don’t understand the command above, are 3 command in sequence or only one? Chirpstack is running correctly but the command above in the prompt is not working, maybe I need some extra work in the config file, seevices or anything else.

Thank you for your help

It is a single command, broken up in different lines. See the README of the repository:

docker-compose run --rm \
    -e MQTT_BROKER_HOSTS="localhost," \
    chirpstack-certificates make set-hosts

Thank you Brocaar, now I figure out how ot works