fix(katenaryfile): Fix parsing katenary file

It seems that "json" annotation fails to get dashed names (like
configmap-files). That means that all labels in katernay.yaml file
couldn't be parsed.

Using `yaml` annotaiton fixes the problem. Fixes #144.

generator/katenaryfile/main_test.go

@@ -123,3 +123,58 @@ webapp:
 		t.Fatal("Expected ingress to be defined", v)
 	}
 }
+
+func TestOverrideConfigMapFiles(t *testing.T) {
+	composeContent := `
+services:
+  webapp:
+    image: nginx:latest
+`
+
+	katenaryfileContent := `
+webapp:
+  configmap-files:
+    - foo/bar
+  ports:
+    - 80
+  ingress:
+    port: 80
+`
+
+	// create /tmp/katenary-test-override directory, save the compose.yaml file
+	tmpDir, err := os.MkdirTemp("", "katenary-test-override")
+	if err != nil {
+		t.Fatalf("Failed to create temp directory: %s", err.Error())
+	}
+	composeFile := filepath.Join(tmpDir, "compose.yaml")
+	katenaryFile := filepath.Join(tmpDir, "katenary.yaml")
+
+	os.MkdirAll(tmpDir, 0755)
+	if err := os.WriteFile(composeFile, []byte(composeContent), 0644); err != nil {
+		t.Log(err)
+	}
+	if err := os.WriteFile(katenaryFile, []byte(katenaryfileContent), 0644); err != nil {
+		t.Log(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	c, _ := os.ReadFile(composeFile)
+	log.Println(string(c))
+
+	// chand dir to this directory
+	os.Chdir(tmpDir)
+	options, _ := cli.NewProjectOptions(nil,
+		cli.WithWorkingDirectory(tmpDir),
+		cli.WithDefaultConfigPath,
+	)
+	project, err := cli.ProjectFromOptions(options)
+	if err != nil {
+		t.Fatalf("Failed to create project from options: %s", err.Error())
+	}
+
+	OverrideWithConfig(project)
+	w := project.Services[0].Labels
+	if v, ok := w[labels.LabelConfigMapFiles]; !ok {
+		t.Fatal("Expected configmap-files to be defined", v)
+	}
+}