Ask HN: Any decent lean metrics and logs solutions?

Mostly addressed to SaaS solopreneurs — how do you monitor your basic app health metrics and check logs and get notified about critical issues _without_ all the hassle and overhead involved in setting up and maintaining prometheus/elk/grafana/etc Do you know of any minimalistic turnkey solutions? Something like importing a single library in your code and making few calls to it. Without drowning in linux, docker, networks, authentication, proxies, pipelines... configuration hell.