Corrected. Now the log_it function accepts not JSON as input, but two...

Corrected. Now the log_it function accepts not JSON as input, but two parameters — the level of logging and the displayed string.
Corrected. The setLogLevel function does not accept a string with a level name, but a parameter from the LogLevel enumeration.
Accordingly, the LogLevel enumeration has been added, which contains logging levels from debug to critical.