Add Cloudflare Workers deployment with OpenNext

- Add wrangler.jsonc configuration for Cloudflare Workers
- Add open-next.config.ts for OpenNext Cloudflare adapter
- Add public/_headers for static asset caching
- Update next.config.ts with initOpenNextCloudflareForDev()
- Add deploy/preview/upload scripts to package.json
- Update .gitignore with .open-next and .dev.vars

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

.gitignore

@@ -41,6 +41,10 @@ yarn-error.log*
 # vercel
 .vercel
 
+# cloudflare
+.open-next
+.dev.vars
+
 # typescript
 *.tsbuildinfo
 next-env.d.ts

next.config.ts

@@ -5,6 +5,9 @@ import {
   getProvincialSlugs,
   getMunicipalitiesByProvince,
 } from "./src/lib/jurisdictions";
+import { initOpenNextCloudflareForDev } from "@opennextjs/cloudflare";
+
+initOpenNextCloudflareForDev();
 
 const nextConfig: NextConfig = {
   /* config options here */

open-next.config.ts

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

package.json

@@ -12,7 +12,11 @@
     "lint:fix": "next lint --fix",
     "format": "prettier --write \"**/*.{ts,tsx,js,jsx,json,css,md}\"",
     "prepare": "node -e \"if (!process.env.CI) { require('child_process').execSync('npx simple-git-hooks', {stdio: 'inherit'}) }\"",
-    "extract": "lingui extract --clean"
+    "extract": "lingui extract --clean",
+    "preview": "opennextjs-cloudflare build && opennextjs-cloudflare preview",
+    "deploy": "opennextjs-cloudflare build && opennextjs-cloudflare deploy",
+    "upload": "opennextjs-cloudflare build && opennextjs-cloudflare upload",
+    "cf-typegen": "wrangler types --env-interface CloudflareEnv cloudflare-env.d.ts"
   },
   "dependencies": {
     "@beehiiv/sdk": "^0.1.6",
@@ -27,6 +31,7 @@
     "@mui/icons-material": "^7.3.1",
     "@mui/material": "^7.3.1",
     "@next/mdx": "^15.5.6",
+    "@opennextjs/cloudflare": "^1.16.4",
     "@radix-ui/react-accordion": "^1.2.12",
     "@radix-ui/react-dialog": "^1.1.15",
     "@radix-ui/react-dropdown-menu": "^2.1.16",
@@ -93,7 +98,8 @@
     "simple-git-hooks": "^2.13.1",
     "tailwindcss": "^4.1.12",
     "tsx": "^4.20.4",
-    "typescript": "^5.9.2"
+    "typescript": "^5.9.2",
+    "wrangler": "^4.65.0"
   },
   "packageManager": "pnpm@9.5.0+sha512.140036830124618d624a2187b50d04289d5a087f326c9edfc0ccd733d76c4f52c3a313d4fc148794a2a9d81553016004e6742e8cf850670268a7387fc220c903",
   "lint-staged": {