Added host struct
Added vanguard agent flags to specify hostname and ip address
Added ip address retreival for host
Added external and internal ip to host
Persistance of port bindings into host information
Added expose parameter to vanguard.yml containers
Exposing ports with vanguard up
Added vanguard hosts command
Updated bindings command to show bindings on all hosts
Added environment variables to vanguard.yml containers
Added ability to specify ip address as environment variable
Added ability to specify host internal ip address as environment variable in container
Added expose parameter to vanguard.yml server config
vanguard up command exposes server custom port bindings