Postfix Exporter:
  - https://github.com/kumina/postfix_exporter
  - https://packages.debian.org/bullseye/prometheus-postfix-exporter

NGINX Exporter:
  - https://github.com/nginxinc/nginx-prometheus-exporter
  - https://packages.debian.org/bullseye/prometheus-nginx-exporter

MySQLd Exporter:
  - https://github.com/prometheus/mysqld_exporter
  - https://packages.debian.org/bullseye/prometheus-mysqld-exporter

Postgres Exporter:
  - https://github.com/prometheus-community/postgres_exporter
  - https://packages.debian.org/bullseye/prometheus-postgres-exporter

Process Exporter:
  - https://github.com/ncabatoff/process-exporter
  - https://packages.debian.org/bullseye/prometheus-process-exporter