Fix commands.

Add username to config struct, if present execute `sudo -E -u username`
in command

app/modules/config/ledofile.go

@@ -17,6 +17,7 @@ type DockerMap struct {
 	Name        string `yaml:"name,omitempty"`
 	MainService string `yaml:"main_service,omitempty"`
 	Shell       string `yaml:"shell,omitempty"`
+	Username    string `yaml:"username,omitempty"`
 }
 
 func NewLedoFile(s string) (*LedoFile, error) {