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>

services/whatsapp-core/Dockerfile

@@ -0,0 +1,19 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+RUN apk add --no-cache python3 make g++
+
+COPY package*.json ./
+RUN npm ci
+
+COPY tsconfig.json ./
+COPY src ./src
+
+RUN npm run build
+
+RUN mkdir -p /app/sessions
+
+EXPOSE 3001
+
+CMD ["npm", "start"]