FROM node:20-slim

# Hugging Face Spaces runs as user 1000
RUN useradd -m -u 1000 user
USER user

ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR $HOME/app

# Copy dependency specifications first for Docker layer caching
COPY --chown=user:user package*.json ./

# Install production and build dependencies
RUN npm install

# Copy application files
COPY --chown=user:user . .

# Expose port 7860 (standard Hugging Face Spaces port)
EXPOSE 7860
ENV PORT=7860
ENV NODE_ENV=production

CMD ["npm", "start"]