Simple appointment booking for small clinics in Vietnam.

• Frontend: Next.js 14 + Tailwind CSS + shadcn/ui
• Backend: Next.js API Routes (serverless)
• Database: Supabase (PostgreSQL + Auth + Realtime)
• SMS/Zalo: Zalo ZNS hoặc eSMS.vn
• Hosting: Vercel (free tier đủ dùng)

• Fast to build (1-2 weeks MVP)
• Free/cheap hosting
• Supabase free tier generous
• Next.js = SEO friendly

• Landing page
• Clinic registration/login
• Basic dashboard
• Add patients
• Create appointments
• Calendar view

• Patient booking page (public link)
• SMS/Zalo reminder
• Basic reports

-- Clinics (tenants)
clinics: id, name, phone, address, slug, created_at
-- Users (clinic staff)
users: id, clinic_id, email, name, role, created_at
-- Patients
patients: id, clinic_id, name, phone, dob, notes, created_at
-- Appointments
appointments: id, clinic_id, patient_id, doctor_name, 
 datetime, duration_min, status, notes, created_at

npm install
cp .env.example .env.local
# Add Supabase keys
npm run dev