Dockerfile

# syntax=docker/dockerfile:1

FROM node:22-alpine AS deps
WORKDIR /app

COPY package*.json ./
RUN npm ci

FROM deps AS build
WORKDIR /app

COPY tsconfig.json ./
COPY src ./src
COPY datasets ./datasets

RUN npm run build

FROM node:22-alpine AS production-deps
WORKDIR /app

ENV NODE_ENV=production

COPY package*.json ./
RUN npm ci --omit=dev && npm cache clean --force

FROM node:22-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV PORT=3000

COPY package*.json ./
COPY --from=production-deps /app/node_modules ./node_modules
COPY --from=build /app/dist ./dist
COPY datasets ./datasets

RUN addgroup -S nodejs && adduser -S nodeuser -G nodejs \
  && chown -R nodeuser:nodejs /app

USER nodeuser

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
  CMD node -e "fetch('http://127.0.0.1:' + (process.env.PORT || 3000) + '/health').then((r) => { if (!r.ok) process.exit(1); }).catch(() => process.exit(1));"

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