Here is the list of logging and monitoring tools we used in our app — for future reference:
Graylog — Log aggregator
NewRelic — Observability platform that provides additional details such as response times for various requests, metrics on which layer took how much time, and a bunch of other metrics that are useful.
Sentry — Error tracking
Morgan — Logging request and response times
Request Id Based Tracking — To track the request during its entire journey