add uploadImgUrl for upload image

backstage/static/js/blockElements.js

@@ -51,7 +51,8 @@ function getImgElements(blockDiv) {
     if (event.target.files[0]) {
       let formData = new FormData();
       formData.append('image', event.target.files[0])
-      axios.post('http://127.0.0.1:5000/api/upload/img?url=/家具規劃作品/公仔與爵士鼓', formData, {
+      const uploadImgUrl = `${PORTAL_SERVER}upload/img?url=${(JSON.parse(document.getElementById('url').textContent)).url}`
+      axios.post(uploadImgUrl, formData, {
         headers: {
         'Content-Type': 'multipart/form-data'
         }