# Node.js backend
FROM node:18-alpine

WORKDIR /app

COPY package*.json ./

RUN npm install --omit=dev

COPY . .

EXPOSE 3001

HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3001/api/health',r=>{process.exit(r.statusCode===200?0:1)}).on('error',()=>process.exit(1))"

CMD ["node", "server.js"]