Move logging config to a file.

By default logging configuration is defined by
resources/default_logging.yaml. Very noisy loggers (like the
uvicorn.access logger) are kept out of the console and UI logs by
default. Developers (or weird users) can customize their default logging
config by copying the file to resources/logging.yaml and editing as
needed. It would be preferable to load this file form the Liberation
user directory, but because first-time initialization requires the UI,
we want to configure logging before we necessarily know where to find
that.

game/server/server.py

@@ -17,7 +17,8 @@ class Server(uvicorn.Server):
                 app=app,
                 host=ServerSettings.get().server_bind_address,
                 port=ServerSettings.get().server_port,
-                log_level="info",
+                # Configured explicitly with default_logging.yaml or logging.yaml.
+                log_config=None,
             )
         )