chore(website): add /docs page

also adds support for redirection to latest version for bare `/docs` requests

website/docs/0.x/index.html

@@ -0,0 +1,9 @@
+<!-- title: Documentation (0.x) — Atlas -->
+<!-- meta_description: Learn how to use the Atlas framework version 0.x -->
+<main class="prose prose-neutral dark:prose-invert flex flex-col items-start space-y-4 px-4 py-2 md:py-4 lg:px-8 lg:py-6">
+  <header>
+    <h1>Documentation (0.x)</h1>
+  </header>
+
+  <p><code>// TODO</code></p>
+</main>

website/main.ts

@@ -46,6 +46,21 @@ async function handler(request: Request): Promise<Response> {
         ...headers,
         "location": `https://doc.deno.land/https://deno.land/x/atlas${mod}`,
       };
+    } // docs
+    else if (pathname === "/docs") {
+      const versions = [];
+      for await (const entry of Deno.readDir(`${cwd}/${pathname}`)) {
+        if (entry.isDirectory) {
+          versions.push(entry);
+        }
+      }
+
+      status = 307;
+      headers = {
+        ...headers,
+        // redirect to latest version
+        "location": `/docs/${versions.at(-1)?.name}`,
+      };
     } // other routes
     else {
       // try /[route].html first