Add automatic Threads link replies and sunrise preview card

index.html

@@ -6,6 +6,14 @@
     <meta name="theme-color" content="#101823" />
     <meta name="description" content="함께 떠나는 온라인 해돋이, 해보러가기" />
     <title>해보러가기</title>
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content="https://sunrise.horoli.kr/" />
+    <meta property="og:title" content="해보러가기 · 관악산 일출" />
+    <meta property="og:description" content="함께 떠나는 온라인 해돋이. 관악산의 일출을 3D 풍경으로 만나보세요." />
+    <meta property="og:image" content="https://sunrise.horoli.kr/og-sunrise.jpg" />
+    <meta property="og:image:width" content="1200" />
+    <meta property="og:image:height" content="630" />
+    <meta property="og:image:alt" content="능선 위로 해가 떠오르기 시작하는 해보러가기 메인 화면" />
     <link rel="preload" href="/fonts/GowunDodum-Title.ttf" as="font" type="font/ttf" crossorigin />
   </head>
   <body class="in-lobby">