deamon: support config daemon is only serving at localhost

[Yorkie Makoto]

It allows user to config the daemon serving host, for example, 127.0.0.1, to avoid the remote access.

[Yorkie Makoto]

1. save this config in daemon.json?
2. pipcook daemon start --host 127.0.0.1?

[feely]

1. save this config in daemon.json?
2. pipcook daemon start --host 127.0.0.1?

I think the port should be configurable too.

[feely]

If we use pipcook daemon start --host 127.0.0.1 to set the host, what does the restart behave?

[Yorkie Makoto]

Restart should keep the last configuration IMO.

[feely]

Restart should keep the last configuration IMO.

So we should overwrite the config file.

[Yorkie Makoto]

What about pipcook daemon start after reboot the machine?

[feely]

Pipcook v2 is available, and we do not have the daemon processor anymore, this issue should be closed.