Make it so that all config options can also be specified by a flag

[krasi-georgiev]

for example

./telliot --web.logLevel=debug
would be the same as if having a configuration file like

{
    "Web": {
        "LogLeve": "debug"
    }
}

cli argument ovveride the configs. This will allow to quickly switch the logs and other configs without the need to specify a config file and also edit it all the time.