TARGETS=https://example.com,https://test.com/status
GRAFANA_USER=admin
GRAFANA_PASSWORD=admin
ALERT_EMAIL_TO=example@example.com
ALERT_EMAIL_FROM=alert@example.com
ALERT_SMTP_HOST=smtp.example.com:25
ALERT_SMTP_USER=smtp_user
ALERT_SMTP_PASSWORD=smtp_password
ALERT_SLACK_WEBHOOK=https://slack.com/webhook