UK_URL=http://uptime-kuma:3001
UK_USER=setup-user
UK_PASS=your_password_here
UK_SLACK_WEBHOOK_HIGH=https://hooks.slack.com/services/...
UK_SLACK_WEBHOOK_MEDIUM=https://hooks.slack.com/services/...
UK_SLACK_WEBHOOK_LOW=https://hooks.slack.com/services/...