test(react-router): Define the tunnel flag in the Cloudflare build

Author: logaretm

dev-packages/e2e-tests/test-applications/react-router-8-framework/vite.cloudflare.config.ts

@@ -5,6 +5,9 @@ import { sentryReactRouter } from '@sentry/react-router/vite';
 import { defineConfig } from 'vite';
 
 export default defineConfig(async config => ({
+  define: {
+    __E2E_TEST_TUNNEL__: JSON.stringify(!!process.env.E2E_TEST_TUNNEL),
+  },
   plugins: [
     cloudflare({ viteEnvironment: { name: 'ssr' } }),
     reactRouter(),