Fix WebKit, Docker REST tests, and BDD faker config for ESM

WebKit security blocks 0.0.0.0 URLs - use 127.0.0.1 for webkit tests.
Docker test-rest was missing node_modules after volume mount.
BDD faker config still used CommonJS require/module.exports.

Changes:
- .github/workflows/playwright.yml: Set localhost URLs for webkit tests
- test/docker-compose.yml: Add node_modules anonymous volume
- test/bdd/codecept.faker.js: Convert to ESM (import/export)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: DavertMik

test/bdd/codecept.faker.js

@@ -1,6 +1,6 @@
-const TestHelper = require('../support/TestHelper')
+import TestHelper from '../support/TestHelper.js'
 
-module.exports.config = {
+export const config = {
   timeout: 10000,
   output: './output',
   helpers: {