[Unit]
Documentation=https://prometheus.io/docs/prometheus/
Requires=docker.service
After=docker.service

[Install]
WantedBy=multi-user.target

[Service]
ExecStartPre=docker pull prom/prometheus
ExecStartPre=-docker stop prometheus
ExecStartPre=-docker rm prometheus
ExecStart=docker run --name prometheus \
    --add-host=host.docker.internal:host-gateway \
    -v /root/prometheus.yml:/etc/prometheus/prometheus.yml:ro \
    prom/prometheus