feat: add a basic blog page and configure .dockerignore for Docker builds

src/app/blog/page.tsx

@@ -0,0 +1,8 @@
+export default function BlogPage() {
+  return (
+    <div className="container mx-auto px-4 py-8">
+      <h1 className="text-3xl font-bold mb-4">Blog</h1>
+      <p>Coming soon...</p>
+    </div>
+  );
+}