Add missing app files and fix Docker configuration

- Add all PHP app files (controllers, middleware, providers, models, enums)
  that were previously gitignored via app/.gitignore wildcard
- Fix app/.gitignore to no longer ignore all files
- Fix docker-compose.yml: use named volume for postgres to avoid chown permission errors on server
- Fix Dockerfile: use --classmap-authoritative for composer dump-autoload

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Providers/RouteServiceProvider.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Providers;
+
+use Illuminate\Cache\RateLimiting\Limit;
+use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\RateLimiter;
+use Illuminate\Support\Facades\Route;
+
+class RouteServiceProvider extends ServiceProvider
+{
+    public const HOME = '/';
+
+    public function boot()
+    {
+        $this->configureRateLimiting();
+
+        $this->routes(function () {
+            Route::prefix('api')
+                ->middleware('api')
+                ->namespace($this->namespace)
+                ->group(base_path('routes/api.php'));
+
+            Route::middleware('web')
+                ->namespace($this->namespace)
+                ->group(base_path('routes/web.php'));
+        });
+    }
+
+    protected function configureRateLimiting()
+    {
+        RateLimiter::for('api', function (Request $request) {
+            return Limit::perMinute(60)->by($request->user()?->id ?: $request->ip());
+        });
+    }
+}