GetConfiguration: read config from .json file 1) No config file, using default value, don't create new file; 2) has config file, error in reading config, stop and display correct info; 3) has config file, no error in reading config, go ahead load and run;.

GetUserConfig -- read the user configuration in json file.

SaveUserConifg -- Save the input configuration in the json filediscarded -.

Configuration to support the info in vnodeconfig.json.