fix panic when inferring stack with empty image

Signed-off-by: Andrea Falzetti <andrea@okteto.com>

pkg/model/manifest.go

@@ -35,7 +35,7 @@ import (
 	oktetoLog "github.com/okteto/okteto/pkg/log"
 	"github.com/okteto/okteto/pkg/model/forward"
 	"github.com/spf13/afero"
-	yaml "gopkg.in/yaml.v2"
+	"gopkg.in/yaml.v2"
 	yaml3 "gopkg.in/yaml.v3"
 )
 
@@ -1052,6 +1052,14 @@ func (m *Manifest) InferFromStack(cwd string) (*Manifest, error) {
 
 			svcInfo.Build = buildInfo
 		} else {
+			if buildInfo == nil {
+				buildInfo = &build.Info{}
+			}
+
+			if len(svcInfo.VolumeMounts) > 0 {
+				buildInfo.VolumesToInclude = svcInfo.VolumeMounts
+			}
+
 			if svcInfo.Image != "" {
 				buildInfo.Image = svcInfo.Image
 			}

pkg/model/manifest_test.go

@@ -795,6 +795,51 @@ func TestInferFromStack(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "infer from stack empty build section and empty image",
+			currentManifest: &Manifest{
+				Deploy: &DeployInfo{
+					Image: constants.OktetoPipelineRunnerImage,
+					ComposeSection: &ComposeSectionInfo{
+						Stack: &Stack{
+							Services: map[string]*Service{
+								"test": {
+									Build: nil,
+									Image: "",
+									Ports: []Port{
+										{
+											HostPort:      8080,
+											ContainerPort: 8080,
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			expectedManifest: &Manifest{
+				Destroy: &DestroyInfo{},
+				Deploy: &DeployInfo{
+					Image: constants.OktetoPipelineRunnerImage,
+					ComposeSection: &ComposeSectionInfo{
+						Stack: &Stack{
+							Services: map[string]*Service{
+								"test": {
+									Image: "",
+									Ports: []Port{
+										{
+											HostPort:      8080,
+											ContainerPort: 8080,
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
 	}
 
 	for _, tt := range tests {