Add default storage for stacks

Fixes #341
Fixes #335

pwd/session.go

@@ -170,7 +170,7 @@ func (p *pwd) SessionDeployStack(s *types.Session) error {
 
 	s.Ready = false
 	p.event.Emit(event.SESSION_READY, s.Id, false)
-	i, err := p.InstanceNew(s, types.InstanceConfig{ImageName: s.ImageName, PlaygroundFQDN: s.Host})
+	i, err := p.InstanceNew(s, types.InstanceConfig{ImageName: s.ImageName, PlaygroundFQDN: s.Host, DindVolumeSize: "5G"})
 	if err != nil {
 		log.Printf("Error creating instance for stack [%s]: %s\n", s.Stack, err)
 		return err