feat: add Layer 1 foundation - Docker, WhatsApp Core, API Gateway, Frontend setup

- docker-compose.yml with PostgreSQL, Redis, all services
- nginx/nginx.conf reverse proxy configuration
- services/whatsapp-core: package.json, tsconfig.json, Dockerfile
- services/api-gateway: requirements.txt, Dockerfile, app/__init__.py
- frontend: package.json, tsconfig.json, vite.config.ts, index.html, Dockerfile, nginx.conf

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,104 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: wac_postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ${DB_NAME:-whatsapp_central}
+      POSTGRES_USER: ${DB_USER:-whatsapp_admin}
+      POSTGRES_PASSWORD: ${DB_PASSWORD:?DB_PASSWORD required}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${DB_USER:-whatsapp_admin}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - wac_network
+
+  redis:
+    image: redis:7-alpine
+    container_name: wac_redis
+    restart: unless-stopped
+    command: redis-server --appendonly yes
+    volumes:
+      - redis_data:/data
+    ports:
+      - "6379:6379"
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - wac_network
+
+  whatsapp-core:
+    build:
+      context: ./services/whatsapp-core
+      dockerfile: Dockerfile
+    container_name: wac_whatsapp
+    restart: unless-stopped
+    environment:
+      NODE_ENV: ${NODE_ENV:-production}
+      REDIS_URL: redis://redis:6379
+      API_GATEWAY_URL: http://api-gateway:8000
+      WS_PORT: 3001
+    volumes:
+      - whatsapp_sessions:/app/sessions
+    ports:
+      - "3001:3001"
+    depends_on:
+      redis:
+        condition: service_healthy
+    networks:
+      - wac_network
+
+  api-gateway:
+    build:
+      context: ./services/api-gateway
+      dockerfile: Dockerfile
+    container_name: wac_api
+    restart: unless-stopped
+    environment:
+      DATABASE_URL: postgresql://${DB_USER:-whatsapp_admin}:${DB_PASSWORD}@postgres:5432/${DB_NAME:-whatsapp_central}
+      REDIS_URL: redis://redis:6379
+      JWT_SECRET: ${JWT_SECRET:?JWT_SECRET required}
+      WHATSAPP_CORE_URL: http://whatsapp-core:3001
+      CORS_ORIGINS: ${CORS_ORIGINS:-http://localhost:5173,http://localhost:3000}
+    ports:
+      - "8000:8000"
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    networks:
+      - wac_network
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    container_name: wac_frontend
+    restart: unless-stopped
+    ports:
+      - "3000:80"
+    depends_on:
+      - api-gateway
+    networks:
+      - wac_network
+
+volumes:
+  postgres_data:
+  redis_data:
+  whatsapp_sessions:
+
+networks:
+  wac_network:
+    driver: bridge