static: set up vanity url

static/index.html

@@ -8,6 +8,8 @@
         <meta name="color-scheme" content="dark light"/>
         <meta name="msapplication-TileColor" content="#ffffff"/>
         <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover"/>
+        <meta name="go-import" content="hakurei.app git https://git.gensokyo.uk/security/hakurei"/>
+        <meta name="go-source" content="hakurei.app _ https://git.gensokyo.uk/security/hakurei/src/branch/master{/dir} https://git.gensokyo.uk/security/hakurei/src/branch/master{/dir}/{file}#L{line}"/>
         <meta property="og:title" content="Hakurei: the secure desktop application sandbox"/>
         <meta property="og:description" content="Hakurei is a security-focused Linux container runtime for desktop applications."/>
         <meta property="og:type" content="website"/>