# ============================================
# WeLe Agentic AI — production image
#
# Speech runs in this same process: ONNX on CPU via Transformers.js. No GPU,
# no Python, no second service.
#
# node:20-slim, NOT alpine. onnxruntime-node ships glibc binaries and Alpine is
# musl, so the native module fails at load with:
#   Error loading shared library ld-linux-x86-64.so.2 (needed by libonnxruntime.so.1)
# `sharp`, pulled in by Transformers.js, has the same constraint.
# ============================================

FROM node:20-slim AS deps
WORKDIR /app
COPY package*.json ./
# `npm ci` builds exactly the lockfile, so a deploy can never silently pick up
# a different dependency tree than the one that was tested.
RUN npm ci --omit=dev

FROM node:20-slim
WORKDIR /app

# Run unprivileged. The base image already ships a `node` user.
ENV NODE_ENV=production \
    PORT=4000

COPY --from=deps /app/node_modules ./node_modules
COPY package.json ./
COPY src/ ./src/

# Both of these get a named volume mounted over them in compose. Docker seeds a
# NEW volume from the image path — including ownership — so they must exist here
# owned by `node`, or the unprivileged process gets EACCES on first write.
RUN mkdir -p /app/storage/artifacts /app/.transformers-cache     && chown -R node:node /app/storage /app/.transformers-cache

USER node
EXPOSE 4000

# Compose owns restart policy; this is the in-container liveness signal.
HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
  CMD node -e "fetch('http://127.0.0.1:'+(process.env.PORT||4000)+'/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"

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