Your container died and docker ps -a shows something like Exited (137) 4 minutes ago . Nine times out of ten that's the kernel's OOM killer, not your app crashing on its own. Here's what exit code 137 actually means and how I go about stopping it from happening again.
Source: [Dev.to](https://dev.to/jjoyneriv/fix-docker-exit-code-137-oomkilled-why-it-happens-and-how-to-stop-it-4ipf)