# Build stage
FROM node:20-slim AS builder

WORKDIR /app

# Copy dependency manifests
COPY package*.json ./

# Install dependencies (including devDependencies for building)
RUN npm ci

# Copy application source
COPY . .

# Build production assets and bundle the TypeScript server
RUN npm run build

# Production runner stage
FROM node:20-slim AS runner

ENV NODE_ENV=production
ENV PORT=7860

WORKDIR /app
RUN chown node:node /app

# Run as non-root 'node' user (UID 1000) for security and Hugging Face compatibility
USER node

# Copy built application assets and manifests
COPY --chown=node:node --from=builder /app/package*.json ./
COPY --chown=node:node --from=builder /app/dist ./dist

# Install production dependencies only
RUN npm ci --omit=dev

EXPOSE 7860

CMD ["npm", "start"]