fix(demo): boot WooCommerce with pnpm demo:up and fix its always-unhealthy healthcheck

[norbert-kulus-blockydevs]

Summary

• pnpm demo:up now starts woocommerce-mysql + woocommerce alongside the existing services, so the one-command demo boots WooCommerce like it already does PrestaShop (no manual service-list override needed).
• docs/one-command-demo-setup-guide.md §1/§3/§4 updated to mention WooCommerce's port, boot command, and URL/credentials.
• Bonus fix found while verifying the above live: the woocommerce healthcheck in docker-compose.yml used the needle "wc/v3" against a file_get_contents response that's PHP json_encode output — which escapes / as \/. The needle never matched, so the container was permanently reported unhealthy even though it worked correctly. Fixed the needle to "wc\/v3". Without this fix there's no way to actually observe "WooCommerce booted healthy" from docker compose ps, so it's bundled with this change rather than filed separately.

Test plan

• Ran the merged compose config (docker compose -f docker-compose.yml -f docker-compose.demo.yml config --services) — confirms woocommerce / woocommerce-mysql resolve correctly with the demo overlay.
• Booted postgres redis mysql phpmyadmin woocommerce-mysql woocommerce prestashop migrate (the new demo:up list minus the app-tier build step) and watched woocommerce's health status.
• Reproduced the pre-existing healthcheck bug directly inside the container (strpos($json, "wc/v3") → false, strpos($json, "wc\/v3") → 14), confirmed the fixed test string returns exit 0.
• After recreating woocommerce with the fixed healthcheck, docker compose ps shows woocommerce Up ... (healthy).
• curl http://localhost:8082/wp-json/wc/v3/ → 200, curl http://localhost:8082/wp-admin/ → 302 (login redirect, as expected) — service is reachable from the host at the documented port.

Closes #1395

[piotrswierzy]

/pr-review — fix(demo): boot WooCommerce with demo:up + fix healthcheck needle

Summary

Adds woocommerce + woocommerce-mysql to the demo:up service list (so the one-command demo boots WooCommerce like it already does PrestaShop) and fixes a permanently-unhealthy WooCommerce healthcheck. Clean, well-diagnosed, docs updated in lockstep. Approve.

Verified

• Healthcheck root cause is correct — the WC REST namespace index is json_encode output, which escapes / as \/, so the old strpos(…, "wc/v3") needle never matched a body containing wc\/v3. The fix ("wc\/v3") is right, and the author verified it live (strpos → 14, container flips to healthy). Good bonus catch. ✅
• Lockstep edits — package.json demo:up and the docs/one-command-demo-setup-guide.md §3 manual command both add woocommerce-mysql woocommerce; §1 ports (8082, 3307) and §4 URL/creds table updated to match. No drift between script and docs. ✅
• Services exist — woocommerce/woocommerce-mysql are already defined in the dev stack (the dev:stack:seed-woocommerce / dev:stack:wc-credentials scripts reference openlinker-woocommerce), and the author confirmed config --services resolves them under the demo overlay. ✅

Note (non-blocking)

Unlike #1393 (PrestaShop), the WC healthcheck stays on file_get_contents rather than curl — correctly so: /wp-json/wc/v3/ returns 200 directly with no PS_DOMAIN-style redirect, so there's no reason to switch, and the inline comment already notes curl/wget aren't in the bitnamilegacy image. No change needed.

Verdict

✅ Approve — demo parity fix + a real healthcheck bug fix, both verified live, docs consistent.