feat: deploy Next.js web app on Cloudflare Workers

[dylsteck]

Summary

• Host apps/web as a Cloudflare Worker (ship-web) via @opennextjs/cloudflare + Wrangler, matching the dylsteck.com Worker deploy pattern.
• Keep the existing Docker / Coolify path: DEPLOY_TARGET=node still produces Next standalone on port 3000.
• Add pnpm deploy:web, CI deploy on main, and Wrangler secrets / build-time env docs.

Notes

• OpenNext gzip is ~4.3 MiB, which exceeds the 3 MiB Workers Free script-size limit. Enable Workers Paid (10 MiB gzip) before pnpm deploy:web.
• After the first deploy, add the web origin to the API Worker ALLOWED_ORIGINS and set GitHub OAuth callback URLs.

Test plan

• pnpm --filter web lint && pnpm --filter web typecheck && pnpm --filter web test && pnpm --filter web build
• cd apps/web && pnpm preview (OpenNext / workerd)
• Docker still builds standalone (DEPLOY_TARGET=node)
• After Workers Paid: pnpm deploy:web, then hit https://ship-web.<account>.workers.dev
• Confirm API CORS and GitHub OAuth still work against the new origin

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