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>

docker-compose.yml

@@ -27,11 +27,13 @@ services:
     image: postgres:10
     restart: always
     volumes:
-      - ./postgres/data:/var/lib/postgresql/data
+      - postgres_data:/var/lib/postgresql/data
     environment:
       POSTGRES_DATABASE: rate_app
       POSTGRES_USER: rate_app
       POSTGRES_PASSWORD: rate_app
-    # command: mysqld --character-set-server=utf8 --collation-server=utf8_unicode_ci
   redis:
     image: redis
+
+volumes:
+  postgres_data: