Logs level

[pschmucker]

Logs level

Overview

Enhance application logs by adding levels such as DEBUG, INFO, WARN, ERROR.

Implementation

• Add a new environment variable LOG_LEVEL to configure the minimal level for messages to be logged
• Use a better logging framework if necessary
• Logging framework must support at least DEBUG, INFO, WARN, ERROR (TRACE and FATAL are optional)
• Use semantic color for log levels if possible
• Adapt all application logs to include the level
• Log pattern: yyyy-mm-dd hh:mm:ss:SSS LEVEL message