feat: change meta tag description, title

public/index.html

@@ -10,7 +10,7 @@
     <meta name="theme-color" content="#ffffff" />
     <meta
       name="description"
-      content="Web site created using create-react-app"
+      content="나와 비슷한 경험을 공유하는 사람들과 익명으로 부담없이 연애상담을 나눠보세요."
     />
 
     <link rel="apple-touch-icon" href="%PUBLIC_URL%/favicon.ico" />
@@ -28,7 +28,7 @@
       work correctly both with client-side routing and a non-root public URL.
       Learn how to configure a non-root public URL by running `npm run build`.
     -->
-    <title>Sharemind</title>
+    <title>셰어마인드 - 경험 공유 연애상담 플랫폼</title>
   </head>
   <!-- Google tag (gtag.js) -->
   <script