FROM docker.m.daocloud.io/library/node:20-alpine

WORKDIR /app

ENV NODE_ENV=production \
    HOST=0.0.0.0 \
    PORT=3000 \
    AUTO_OPEN=0

COPY package*.json ./
RUN if [ -f package-lock.json ]; then npm ci --omit=dev; else npm install --omit=dev; fi

COPY sub2proxy.js ./
COPY public ./public
COPY templates ./templates

RUN mkdir -p out && printf '[]\n' > subs.json

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD node -e "require('http').get('http://127.0.0.1:'+(process.env.PORT||3000)+'/api/health',r=>process.exit(r.statusCode===200?0:1)).on('error',()=>process.exit(1))"

CMD ["node", "sub2proxy.js"]