Add Container Options

packages/vitec/Configuration/TypoScript/Headless/vitec_containers.typoscript

@@ -125,6 +125,12 @@ tt_content.vitec_container.fields.cssClass.data = flexform:pi_flexform:settings.
 tt_content.vitec_container.fields.cssClass.stdWrap.ifEmpty.cObject = TEXT
 tt_content.vitec_container.fields.cssClass.stdWrap.ifEmpty.cObject.value =
 
+# Optional background image with its two CSS settings. The renderer returns an
+# empty string when no image is set, so the `background` key stays out of the
+# payload entirely rather than appearing with a null image.
+tt_content.vitec_container.fields.background = USER
+tt_content.vitec_container.fields.background.userFunc = Evomedien\Vitec\UserFunc\ContainerBackgroundRenderer->render
+
 # -----------------------------------------------------------------------------
 # VITEC · Cards Carousel — container whose children (typically vitec_card
 # elements) become the slides. Inherits the grid-container JSON structure