Function setup_logger 

pub fn setup_logger()

Sets up a logger for the application

The logger level is determined by the LOGLEVEL environment variable. Supported log levels are:

• DEBUG: Captures detailed debug information.
• ERROR: Captures error messages.
• WARN: Captures warnings.
• TRACE: Captures detailed trace logs.
• All other values default to INFO, which captures general information.

Behavior:

• Concurrent calls to this function result in the logger being initialized only once.

Panics

This function panics if setting the default subscriber fails.