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

vim /etc/apache2/sites-available/lightmeter.example.com.conf

<VirtualHost *:80>
    ServerName lightmeter.example.com
    ServerAdmin hostmaster@example.com
    Redirect "/" "https://lightmeter.example.com/"

    ErrorLog ${APACHE_LOG_DIR}/lightmeter.example.com-error.log
    LogLevel warn
    CustomLog ${APACHE_LOG_DIR}/lightmeter.example.com-access.log combined
</VirtualHost>

<VirtualHost *:443>
    ServerName lightmeter.example.com
    ServerAdmin hostmaster@example.com

    SSLEngine on
    SSLCertificateFile      /etc/dehydrated/certs/example.com/fullchain.pem
    SSLCertificateKeyFile   /etc/dehydrated/certs/example.com/privkey.pem

    <Location "/.well-known/acme-challenge/">
        Allow From All
        Satisfy Any
    </Location>

    ProxyPassMatch ^/.well-known !
    ProxyPass "/" "http://127.0.0.1:8085/"
    ProxyPassReverse "/" "http://127.0.0.1:8085/"

    ErrorLog ${APACHE_LOG_DIR}/lightmeter.example.com-error.log
    LogLevel warn
    CustomLog ${APACHE_LOG_DIR}/lightmeter.example.com-access.log combined
</VirtualHost>

a2ensite lightmeter.example.com
apachectl graceful