https://gitlab.com/lightmeter/controlcenter/-/blob/master/README.md

adduser lightmeter
usermod -a -G adm lightmeter

wget -O /usr/local/bin/lightmeter "https://bintray.com/lightmeter/controlcenter/download_file?file_path=lightmeter-linux_amd64-1.0.1"

chmod +rx /usr/local/bin/lightmeter

mkdir /var/lib/lightmeter
chown lightmeter:lightmeter /var/lib/lightmeter

vim /etc/systemd/system/lightmeter.service

[Unit]
Description=Lightmeter is a monitoring and analysis system for Postfix mail servers (https://lightmeter.io)
After=network.target

[Service]
Type=simple
User=lightmeter
;Group=adm
Group=lightmeter
ExecStart=/usr/local/bin/lightmeter -workspace /var/lib/lightmeter/lightmeter_workspace -watch_dir /var/log/ -listen 127.0.0.1:8085
Restart=on-failure

; security
PrivateDevices=yes
PrivateTmp=yes
ProtectSystem=full
ReadWriteDirectories=/var/log/ /var/lib/lightmeter/ /usr/local/bin/ /tmp/
ProtectHome=yes
NoNewPrivileges=yes

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
systemctl start lightmeter.service