bug: update metadata title and desc

docs/docusaurus.config.js

@@ -126,7 +126,7 @@ const config = {
 
   // Docs: https://docusaurus.io/docs/api/themes/configuration
   themeConfig: {
-    image: "img/jan-social-card.png",
+    image: "img/og-image.png",
     // Only for react live
     liveCodeBlock: {
       playgroundPosition: "bottom",
@@ -158,7 +158,7 @@ const config = {
       },
       {
         property: "og:image",
-        content: "https://jan.ai/img/jan-social-card.png",
+        content: "https://jan.ai/img/og-image.png",
       },
       { property: "og:type", content: "website" },
       { property: "twitter:card", content: "summary_large_image" },
@@ -171,7 +171,7 @@ const config = {
       },
       {
         property: "twitter:image",
-        content: "https://jan.ai/img/jan-social-card.png",
+        content: "https://jan.ai/img/og-image.png",
       },
     ],
     headTags: [

docs/src/pages/index.js

@@ -25,8 +25,8 @@ export default function Home() {
     <>
       <Banner />
       <Layout
-        title={`${siteConfig.tagline}`}
-        description="Jan is a ChatGPT-alternative that runs on your own computer, with a local API server."
+        title="Jan | Open-source ChatGPT Alternative"
+        description="Jan runs 100% offline on your computer, utilizes open-source AI models, prioritizes privacy, and is highly customizable."
       >
         <main>
           <div className="grid grid-cols-1 lg:grid-cols-12 -mt-1 gap-8 items-center relative min-h-[calc(100vh-96px)] ">