Allow adding context to logging instance

[gndelia]

When using this logger in microservices, while the program may be the same, it may be called from different lambdas. We should allow adding some contextual information so that when seeing the logs in Papertrail, we can filter by a specific lambda in a program (At this moment, all logs from different lambdas in the same program are mixed and we can't easily tell which belongs to which one)