FROM node:18-alpine AS base

# Install dumb-init for proper signal handling
RUN apk add --no-cache dumb-init

WORKDIR /usr/src/app
COPY package*.json ./
RUN npm ci --only=production && npm cache clean --force

FROM base AS production
COPY --from=base /usr/src/app/node_modules ./node_modules
COPY . .

RUN rm -f package*.json

ENV NODE_ENV=production
ENV PORT=3001
EXPOSE 3001

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

ENTRYPOINT ["dumb-init", "--"]

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