add dynamic documents

app/javascript/template_builder/document.vue

@@ -168,7 +168,7 @@ export default {
         return this.previewImagesIndex[i] || reactive({
           metadata: { ...lazyloadMetadata },
           id: Math.random().toString(),
-          url: this.basePreviewUrl + `/preview/${this.document.signed_uuid || this.document.uuid}/${i}.jpg`
+          url: this.basePreviewUrl + `/preview/${this.document.signed_key || this.document.signed_uuid || this.document.uuid}/${i}.jpg`
         })
       })
     },