Install the Web application

Use the verified quick start for creation, the worker-count cast and a real JSON route. Web requires PHP ^8.2 and curl/json directly; Engine and other dependencies add requirements.

composer create-project triangle/web my-app
cd my-app
composer check-platform-reqs
composer show --direct

Keep composer.lock. Review actual runtime compatibility and configuration before php master start. The current default listener is loopback port 8000 unless environment overrides it. Do not combine the mutually conflicting HTTP and WS engines.