Preview: health checks and alerting (deprecated)

Can you describe how “TCP connections, or HTTP tests” types of checks are supposed to be defined in fly.toml? Does it simply use what’s defined in [[services.tcp_checks]] and/or [[services.http_checks]] or do you need to specify a different type in [checks.my-check-name]?

Also tiny note, the Slack handler does not accept a user icon (anymore?).