Does zigbee2mqtt require a pre-setup m2qtt-server?

[PABben]

I've tried to install the zigbee2mqtt bridge on several machines but i still fail.
Does it require a "mqtt-server" or does the "zigbee2mqtt" include everything i need?

Edit: Yes it does. I used ubuntu GUI-version and installed mosquitto. zigbee2mqtt connected after installing, no need to configure it seems.