Fix image repo host not found error (#18)

## Summary
Fix image repo host not found error

## How was it tested?
launchpad up

## Is this change backwards-compatible?
yes

Author: LucilleH

launchpad/publish.go

@@ -114,7 +114,7 @@ type PublishPlan struct {
 
 type PublishOutput struct {
 	Duration        time.Duration
-	RegistryHost    registryHost
+	registryHost    registryHost
 	publishedImages map[string]string
 }
 
@@ -154,6 +154,13 @@ func (do *PublishOutput) SetDuration(d time.Duration) {
 	}
 }
 
+func (o *PublishOutput) RegistryHost() string {
+	if o == nil {
+		return ""
+	}
+	return string(o.registryHost)
+}
+
 func getRemoteRegistryInfo(
 	ctx context.Context,
 	pubOpts *PublishOptions,
@@ -479,7 +486,7 @@ func (p *Pad) publishDockerImage(
 
 	return &PublishOutput{
 		publishedImages: published,
-		RegistryHost:    plan.registry.GetHost(),
+		registryHost:    plan.registry.GetHost(),
 	}, nil
 }
 

padcli/command/deploy.go

@@ -63,7 +63,7 @@ func makeDeployOptions(
 		helm.NewImageProvider(
 			buildOutput.Image.String(),
 			publishOutput.PublishedImages(),
-			string(publishOutput.RegistryHost),
+			publishOutput.RegistryHost(),
 		),
 		jetCfg,
 		cluster,