Make sudo as an option

[yuchen-sun]

The commands in the code are now prefixed with sudo by default, which may introduce

1. security problems
2. users actually have permission to follow commands, but not a sudoer, causing tasks to fail. (For example, the user is in the docker group, but not a sudoer)

I feel that sudo should be included as an optional parameter -sudo or --root ? and only add sudo in front of the command after enabling the parameter.

[Wine93]

CurveAdm v1.0 has support the sudo option, like curveadm deploy --sudo.