FROM node:20-alpine AS deps
WORKDIR /app
COPY package.json ./
RUN npm install --omit=dev --no-audit --no-fund && npm install --no-save tsx@4.19.2 typescript@5.7.2

FROM node:20-alpine AS runtime
WORKDIR /app
ENV NODE_ENV=production
COPY --from=deps /app/node_modules ./node_modules
COPY package.json tsconfig.json ./
COPY src ./src
EXPOSE 3000
# 127.0.0.1, not localhost: busybox wget resolves localhost to ::1 first and
# the server binds IPv4 only, so a localhost check would wrongly fail.
HEALTHCHECK --interval=15s --timeout=3s --start-period=10s --retries=3 \
  CMD wget -qO- http://127.0.0.1:3000/health || exit 1
CMD ["npx", "tsx", "src/server.ts"]
