Using JSON String Marshalling for HTTP Loggers

For headers and log attribute, utilize json string marshalling when adding the attributes to make it easier to write alerts based off the logs.

What's Changed

• Adding func to context logger to add logger to context by Manasa Chinta (@manasachi) in #34
• Send logs to log column as json string by Manasa Chinta (@manasachi) in #35

Full Changelog: v0.0.36...v0.0.37