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

.dockerignore

@@ -0,0 +1,12 @@
+node_modules
+.next
+.git
+.env
+Dockerfile
+docker-compose.yml
+deploy.sh
+postgres_data
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*

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>
+  );
+}