bot: main: fix root logger not being initialised correctly

tl;dr: shouldn't have passed __name__ to logging.getLogger()

This also makes it so that discord.py is logging everything as
expected, which it didn't do before.

Signed-off-by: Max R. Carrara <max@aequito.sh>

src/bot/main.py

@@ -11,11 +11,11 @@ from discord.ext import commands
 from bot.env import Environment
 
 
-_log: logging.Logger
+_log = logging.getLogger(__name__)
 
 
-def setup_logging() -> logging.Logger:
-    root_logger = logging.getLogger(__name__)
+def setup_logging():
+    root_logger = logging.getLogger()
 
     log_level_map = {
         "NOTSET": logging.NOTSET,
@@ -57,8 +57,6 @@ def setup_logging() -> logging.Logger:
     log_error_file_handler.setLevel(logging.ERROR)
     root_logger.addHandler(log_error_file_handler)
 
-    return root_logger
-
 
 def setup_bot() -> commands.Bot:
     intents = discord.Intents.all()
@@ -181,7 +179,7 @@ async def main():
         await bot.start(token=token, reconnect=True)
 
 
-_log = setup_logging()
+setup_logging()
 _log.debug("Logging initialised")
 
 _log.debug(f"{sys.argv = }")