HTML: Added structured data for SoftwareApplication schema.

Author: Pavlusha311245

source/theme/layout.html

@@ -27,7 +27,31 @@
 <meta property="og:image:height" content="357">
 <meta property="og:image:alt" content="NGINX Unit logo" />
 <!-- Twitter -->
-<meta property="twitter:card" content="summary_large_image">
+<meta property="twitter:card" content="summary_large_image" />
+
+<script type="application/ld+json">
+        {
+            "@context": "https://schema.org",
+            "@type": "SoftwareApplication",
+            "name": "NGINX Unit",
+            "url": "https://unit.nginx.org/",
+            "image": "https://unit.nginx.org/_static/logo.svg?",
+            "applicationCategory": "WebServerApplication",
+            "operatingSystem": "Linux, macOS, FreeBSD",
+            "softwareVersion": "1.34.2",
+            "author": {
+                "@type": "Organization",
+                "name": "NGINX, Inc.",
+                "url": "https://www.nginx.com/"
+            },
+            "description": "NGINX Unit is a lightweight and versatile application runtime that provides the essential components for your web application as a single open-source server: running application code (including WebAssembly), serving static assets, handling TLS and request routing.",
+            "license": "https://www.apache.org/licenses/LICENSE-2.0",
+            "softwareHelp": "https://unit.nginx.org/",
+            "releaseNotes": "https://unit.nginx.org/CHANGES.txt",
+            "downloadUrl": "https://unit.nginx.org/installation/"
+        }
+</script>
+
 
 <style>
 /* open-sans-regular - latin_latin-ext */