fix: volume was not generated

Author: HenryQW

pkg/cmd/cmd.go

@@ -47,7 +47,9 @@ Then, with a single command, you create and start all the services from your con
 			return err
 		}
 
-		fmt.Println(b.String())
+		// Remove null values in the yaml output
+		output := strings.ReplaceAll(b.String(), " null", "")
+		fmt.Println(output)
 
 		return nil
 	},

pkg/compose/compose.go

@@ -9,6 +9,7 @@ import (
 
 type Compose struct {
 	Services map[string]Service
+	Volumes  map[string]*string
 }
 
 type Service struct {
@@ -34,14 +35,17 @@ func NewCompose(options ...Option) *Compose {
 				ContainerName: "cockroachdb",
 				Image:         "cockroachdb/cockroach:v23.2.5",
 				Ports:         []string{"26257:26257", "8080:8080"},
-				Volumes:       []string{"cockroachdb:/cockroach/cockroach-data"},
+				Volumes:       []string{fmt.Sprintf("%s:/cockroach/cockroach-data", cockroachdbVolume)},
 				Command:       "start-single-node --cluster-name=node --insecure",
 			},
 			"core": {
 				ContainerName: "core",
 				Image:         "rss3/node:latest",
 			},
 		},
+		Volumes: map[string]*string{
+			cockroachdbVolume: nil,
+		},
 	}
 
 	for _, option := range options {