Add Docker entrypoint and cleanup gitignore

- Add entrypoint.sh for automated app initialization (composer, npm, migrations, cache)
- Update Dockerfile: run entrypoint as root, php-fpm workers still run as appuser
- Update .gitignore: exclude storage/logs, storage/framework, bootstrap/cache, public/build
- Remove generated/cached files from git tracking

docker/php/Dockerfile

@@ -62,8 +62,6 @@ RUN chmod +x /usr/local/bin/entrypoint.sh
 # Set ownership
 RUN chown -R appuser:appuser /var/www/html
 
-USER appuser
-
 EXPOSE 9000
 
 ENTRYPOINT ["entrypoint.sh"]