Initial setup documentation

[Dejan SANADER]

First, thanks for the work.

I've installed dockyard with go get, then launched it from a random directory since the dockyard command was in my $PATH.

I had trouble then figuring out that the binary was not finding the configuration file (the error message was not obvious). The README seems to imply that the project should be fetch with git clone, be build with go build and run in place ./dockyard.

Maybe, detailing a bit the installation and documenting the possible configuration file path and format would be useful (eg: toml in either /etc/containerops, $HOME/.containerops, ./conf).

Small thing, the README is also mentioning a daemon run subcommand.