fix playwright config: use chromium, remove remote debugging

playwright.config.ts

@@ -1,8 +1,7 @@
 import { defineConfig, devices } from '@playwright/test';
 
-const baseURL = process.env.BASE_URL || 'http://127.0.0.1:3000';
+const baseURL = process.env.FRONTEND_URL || 'http://frontend:3000';
-const webServerURL = process.env.WEB_SERVER_URL || baseURL;
+const backendURL = process.env.BACKEND_URL || 'http://backend:8000';
-const chromeDebuggingPort = process.env.CHROME_DEBUGGING_PORT || '9222';
 
 export default defineConfig({
   testDir: './tests',
@@ -14,22 +13,16 @@ export default defineConfig({
   use: {
     baseURL,
     trace: 'on-first-retry',
-    launchOptions: {
-      args: [`--remote-debugging-port=${chromeDebuggingPort}`],
-    },
   },
   projects: [
     {
       name: 'chromium',
-      use: { 
+      use: { ...devices['Desktop Chrome'] },
-        ...devices['Desktop Chrome'],
-        channel: 'chrome',
-      },
     },
   ],
   webServer: {
     command: 'npm run dev',
-    url: webServerURL,
+    url: baseURL,
     reuseExistingServer: !process.env.CI,
   },
 });