feat(web): migrate from pages to workers and add posthog analytics

Author: AmanVarshney01

apps/web/.gitignore

@@ -12,19 +12,20 @@
 /out/
 /build
 *.tsbuildinfo
+.open-next
 
 # misc
 .DS_Store
 *.pem
 /.pnp
 .pnp.js
 npm-debug.log*
-yarn-debug.log* 
+yarn-debug.log*
 yarn-error.log*
 
 # others
 .env*.local
 .vercel
 next-env.d.ts
 
-analytics-data.json
+analytics-data.json

apps/web/instrumentation-client.ts

@@ -0,0 +1,9 @@
+import posthog from "posthog-js"
+
+posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY!, {
+  api_host: "/ingest",
+  ui_host: "https://us.posthog.com",
+  defaults: '2025-05-24',
+  capture_exceptions: true, // This enables capturing exceptions using Error Tracking
+  debug: process.env.NODE_ENV === "development",
+});

apps/web/next.config.mjs

@@ -5,10 +5,27 @@ const withMDX = createMDX();
 /** @type {import('next').NextConfig} */
 const config = {
 	reactStrictMode: true,
-	output: "export",
+	// This is required to support PostHog trailing slash API requests
+	skipTrailingSlashRedirect: true,
 	experimental: {
 		reactCompiler: true,
 	},
+	async rewrites() {
+		return [
+			{
+				source: "/ingest/static/:path*",
+				destination: "https://us-assets.i.posthog.com/static/:path*",
+			},
+			{
+				source: "/ingest/:path*",
+				destination: "https://us.i.posthog.com/:path*",
+			},
+			{
+				source: "/ingest/decide",
+				destination: "https://us.i.posthog.com/decide",
+			},
+		];
+	},
 };
 
 export default withMDX(config);

apps/web/open-next.config.ts

@@ -0,0 +1,3 @@
+import { defineCloudflareConfig } from "@opennextjs/cloudflare";
+
+export default defineCloudflareConfig();

apps/web/package.json

@@ -9,43 +9,49 @@
     "start": "next start",
     "check": "biome check --write .",
     "postinstall": "fumadocs-mdx",
+    "preview": "opennextjs-cloudflare build && opennextjs-cloudflare preview",
+    "deploy": "opennextjs-cloudflare build && opennextjs-cloudflare deploy",
+    "cf-typegen": "wrangler types --env-interface CloudflareEnv cloudflare-env.d.ts",
     "generate-analytics": "bun scripts/generate-analytics.ts",
     "generate-schema": "bun scripts/generate-schema.ts"
   },
   "dependencies": {
+    "@opennextjs/cloudflare": "^1.5.1",
     "babel-plugin-react-compiler": "^19.1.0-rc.2",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",
-    "fumadocs-core": "15.5.1",
-    "fumadocs-mdx": "11.6.7",
-    "fumadocs-ui": "15.5.1",
-    "lucide-react": "^0.513.0",
-    "motion": "^12.18.1",
-    "next": "15.3.3",
+    "fumadocs-core": "15.6.3",
+    "fumadocs-mdx": "11.6.11",
+    "fumadocs-ui": "15.6.3",
+    "lucide-react": "^0.525.0",
+    "motion": "^12.23.3",
+    "next": "15.3.5",
     "next-themes": "^0.4.6",
     "nuqs": "^2.4.3",
     "papaparse": "^5.5.3",
+    "posthog-js": "^1.257.0",
     "radix-ui": "^1.4.2",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "react-tweet": "^3.2.2",
-    "recharts": "^2.15.4",
-    "sonner": "^2.0.5",
+    "recharts": "^3.1.0",
+    "sonner": "^2.0.6",
     "tailwind-merge": "^3.3.1"
   },
   "devDependencies": {
-    "@tailwindcss/postcss": "^4.1.10",
+    "@tailwindcss/postcss": "^4.1.11",
     "@types/mdx": "^2.0.13",
-    "@types/node": "24.0.0",
+    "@types/node": "24.0.13",
     "@types/papaparse": "^5.3.16",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
-    "eslint": "^9.29.0",
-    "eslint-config-next": "15.3.3",
+    "eslint": "^9.31.0",
+    "eslint-config-next": "15.3.5",
     "postcss": "^8.5.6",
-    "tailwindcss": "^4.1.10",
-    "tw-animate-css": "^1.3.4",
-    "typescript": "^5.8.3"
+    "tailwindcss": "^4.1.11",
+    "tw-animate-css": "^1.3.5",
+    "typescript": "^5.8.3",
+    "wrangler": "^4.24.3"
   }
 }

apps/web/wrangler.jsonc

@@ -0,0 +1,10 @@
+{
+	"main": ".open-next/worker.js",
+	"name": "better-t-stack",
+	"compatibility_date": "2025-07-13",
+	"compatibility_flags": ["nodejs_compat"],
+	"assets": {
+		"directory": ".open-next/assets",
+		"binding": "ASSETS"
+	}
+}

bun.lock

@@ -12,8 +12,7 @@
 		"check": "turbo check",
 		"format": "biome check --write .",
 		"publish-packages": "turbo run build --filter=create-better-t-stack && changeset publish",
-		"build:web:cloudflare": "bun install && bun run build:web",
-		"deploy:web": "bun run build:web:cloudflare && bunx wrangler pages deploy ./apps/web/out"
+		"deploy:web": "bun run --filter=web deploy"
 	},
 	"devDependencies": {
 		"@biomejs/biome": "^2.0.2",