feat: add initial project configuration and smoke tests

- Created pnpm workspace configuration to manage packages.
- Added a placeholder .gitkeep file in the scripts directory.
- Implemented a smoke test script to validate core API and web endpoints.
- Established TypeScript base configuration for consistent compilation settings.
- Introduced Turbo configuration for task management and build processes.

CHANGELOG.md

@@ -0,0 +1,28 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [0.1.0-alpha.0] — 2026-03-12
+
+### Added
+
+- **Monorepo scaffold** — pnpm workspaces with `packages/api`, `packages/web`, `packages/shared`
+- **NestJS 11 API shell** — Fastify 5 adapter, health endpoint (`GET /api/health`), ConfigModule with env validation
+- **Next.js 15.5.x frontend shell** — App Router, next-intl i18n, Tailwind CSS v4, shadcn/ui base config
+- **Prisma 7 schema shell** — PostgreSQL datasource, placeholder model for client generation
+- **Shared types package** — `@davinci/shared` with barrel exports, build via TypeScript
+- **Turborepo** — build caching and task orchestration across packages
+- **Vitest** — test runner for all packages (replaces Jest)
+- **ESLint flat config** — TypeScript + Prettier integration, single root config
+- **Prettier** — consistent formatting with pre-commit hooks (Husky + lint-staged)
+- **Docker** — multi-stage Dockerfile (nginx + NestJS + Next.js), docker-compose for dev
+- **nginx** — internal routing `/api/*` → :3001, `/*` → :3000
+- **Makefile** — developer command interface matching architecture spec
+- **README** — quickstart, project structure, environment variables
+- **smoke-test.sh SKIP_WEB** — `SKIP_WEB=1 make smoke` skips web container for API-only workflows
+
+### Fixed
+
+- **Docker healthcheck IPv6** — changed `localhost` to `127.0.0.1` in docker-compose healthcheck URLs (Alpine wget resolves localhost → ::1 IPv6, Fastify listens on IPv4 only)
+- **Scalar ESM import (TS1479)** — converted static import of `@scalar/fastify-api-reference` to dynamic `import()` since the package is ESM-only
+- **Test import** — added missing `afterEach` to vitest import in `api-docs.setup.spec.ts`