0exit code is successful and indicates a purposefully stopped container, while a
1exit code indicates an error. Other exit codes (larger than 1) also indicate an error state, and contain more information about what kind of error occurred.
137: OOM or Out of Memory, indicates that your container did not have enough RAM allocated to process what it was trying to do. Sometimes this can be resolved by assiging more resources to your instances, but if it is the cause of a memory leak or similar, you might need to debug the root cause in your application.