Add log to channel on shutdown and startup

[MattyTheHacker]

No description provided.

[CarrotManMatt]

This would send a duplicated message into the log channel. Whenever a log message is sent via logger.info(), logger.error() etc, it is sent to every destination (console & log channel), but may be filtered out. The reason why the messages are not being sent to the log channel is because the default level is set to WARNING so the info messages aren't shown. If you would like to see the INFO level messages like this ready message, the log level of the Discord logger needs to be set to allow INFO messages.

The Discord channel log level will be configurable as a config variable rather than being hard-coded after merging of #221

[MattyTheHacker]

I think this is a case where we (I) would want those messages sent regardless of log level - hence the way I've written it, but i didn't realise it would duplicate

[CarrotManMatt]

Unfortunately there is no possible way to send the message all of the time to the log channel and not have it duplicated (without not sending it to the console)