I Built a Multi-Tenant Car Dealer SaaS in 2 Weeks — Here's the Stack

I Built a Multi-Tenant Car Dealer SaaS in 2 Weeks — Here's the Stack I wanted to solve a real problem: used car dealers need websites but can't afford developers. So I built ListKars — a platform where dealers sign up, pick a theme, and get a live website in minutes. Free. Here's how it works and what I learned. The Problem Most preowned car dealers run their business from WhatsApp and OLX. They don't have websites because: Custom development costs $500-$5,000+ WordPress is too complex for non-tech people Marketplace listings (OLX, CarDekho) don't build their brand I wanted to give them a branded website with zero setup cost. The Stack Monorepo: Turborepo + pnpm workspaces Backend: NestJS + Fastify + SWC Database: PostgreSQL + Drizzle ORM Frontend: Next.js 15 (App Router) + Tailwind CSS 4 Storage: MinIO (S3-compatible) + Sharp for image optimization Search: Meilisearch Cache: Redis Auth: Google OAuth + JWT + refresh tokens Deployment: Docker Compose on a VPS + Caddy reverse proxy CDN: