# CoFi Registration App

## Overview
Standalone event registration + payment app for CoFi (Collaborative Finance).
Runs on Netcup at `payment.collaborative-finance.net`, linked from the main site at `www.collaborative-finance.net` via a simple button.

Adapted from `crypto-commons-gather.ing-website` with centralized config.

## Architecture
- **Stack**: Next.js 16 (App Router, standalone) + Mollie + Google Sheets + Mailcow SMTP + Listmonk
- **Deploy**: Docker on Netcup with Traefik labels
- **Domain**: `payment.collaborative-finance.net` (CNAME → Cloudflare tunnel on Netcup)
- **Key pattern**: All event-specific config centralized in `lib/event.config.ts`

## Flow
1. User clicks "Register" button on `www.collaborative-finance.net` → opens `payment.collaborative-finance.net`
2. User fills form → POST `/api/register` → Google Sheets (Pending)
3. User picks accommodation/payment → POST `/api/create-checkout-session` → Mollie redirect
4. Mollie webhook POST `/api/webhook` → verify payment → assign booking → update sheet → email → Listmonk

## Key Files
- `lib/event.config.ts` — **Edit this to configure event** (pricing, dates, venues, branding, links)
- `lib/mollie.ts` — Shared Mollie client singleton
- `app/globals.css` — Blue/teal OKLch color theme
- `docker-compose.yml` — Traefik-labeled deployment
- `embed-snippet.html` — Copy-paste button HTML for the main website

## Embedding on the main site
Send `embed-snippet.html` to the website owner. It contains a self-contained styled button
that links to the registration page. No iframe, no JS, no CORS — just a simple `<a>` tag.

## Dev Workflow
```bash
pnpm install
pnpm dev          # localhost:3000 → registration form
```

## Deployment
1. Your friend adds a CNAME: `payment.collaborative-finance.net` → Cloudflare tunnel
2. On Netcup: `docker compose up -d --build`
3. Traefik auto-discovers via labels, Cloudflare tunnel handles TLS

## DNS Setup (friend's side)
```
payment.collaborative-finance.net  CNAME  <your-cloudflare-tunnel-id>.cfargotunnel.com
```
Or if using Cloudflare proxy on their domain, they can add the CNAME to point to your tunnel.