Insert image size in meta tag

index.html

@@ -13,9 +13,10 @@
     <meta property="og:type" content="website">
     <meta property="og:description" content="This is a Vue 3 application that showcases usage of fullcalendar for tutorial purposes.">
     <meta property="og:image" content="https://raw.githubusercontent.com/YSHgroup/vue3-fullcalendar-bootstrap/main/src/assets/fullcalendar-first-page.png">
+    <meta property="og:image:width" content="1200">
+    <meta property="og:image:height" content="600">
+    <meta property="og:image:alt" content="Fullcalendar screen" />
     <meta property="og:url" content="https://yshgroup.github.io/vue3-fullcalendar-bootstrap/">
-    <meta itemprop="image" content="https://raw.githubusercontent.com/YSHgroup/vue3-fullcalendar-bootstrap/main/src/assets/fullcalendar-first-page.png?format=1500w">
-
 
     <meta name="twitter:card" content="summary_large_image">
     <meta name="twitter:title" content="Vue3 - fullcalendar app">