Initial project structure: Next.js 15 + TypeScript + Drizzle ORM

- Next.js 15 with App Router, TypeScript, Tailwind CSS
- Directory structure per LegalAI architecture plan
- Docker Compose setup (PostgreSQL 16, Meilisearch, App)
- Drizzle ORM with base schema (tenants, users, norms, decisions)
- AI abstraction layer structure (Vercel AI SDK)
- Normen-Engine with Quellenrang hierarchy
- Search abstraction layer
- Auth placeholder (NextAuth.js)

Co-Authored-By: Paperclip <noreply@paperclip.ing>

docker-compose.yml

@@ -0,0 +1,49 @@
+services:
+  app:
+    build: .
+    ports:
+      - "3000:3000"
+    environment:
+      - DATABASE_URL=postgresql://legalai:legalai@postgres:5432/legalai
+      - MEILISEARCH_URL=http://meilisearch:7700
+      - MEILISEARCH_API_KEY=${MEILISEARCH_API_KEY:-masterKey}
+      - NEXTAUTH_URL=http://localhost:3000
+      - NEXTAUTH_SECRET=${NEXTAUTH_SECRET}
+      - AI_PROVIDER=${AI_PROVIDER:-anthropic}
+      - ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY}
+      - OPENAI_API_KEY=${OPENAI_API_KEY}
+    depends_on:
+      postgres:
+        condition: service_healthy
+      meilisearch:
+        condition: service_started
+
+  postgres:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_USER: legalai
+      POSTGRES_PASSWORD: legalai
+      POSTGRES_DB: legalai
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U legalai"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  meilisearch:
+    image: getmeili/meilisearch:v1.11
+    environment:
+      - MEILI_MASTER_KEY=${MEILISEARCH_API_KEY:-masterKey}
+      - MEILI_ENV=development
+    ports:
+      - "7700:7700"
+    volumes:
+      - meilisearch_data:/meili_data
+
+volumes:
+  postgres_data:
+  meilisearch_data: