Fix deployment runtime to avoid 502 on hosted server

Dockerfile

@@ -53,7 +53,7 @@ RUN cp .env.example .env || true \
 COPY docker/entrypoint.sh /usr/local/bin/entrypoint.sh
 RUN chmod +x /usr/local/bin/entrypoint.sh
 
-EXPOSE 9000
+EXPOSE 8000
 
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
-CMD ["php-fpm", "-F"]
+CMD ["sh", "-c", "php artisan serve --host=0.0.0.0 --port=${PORT:-8000}"]