Dockerfile

# Use the official Node.js runtime as base image
FROM node:18-alpine

# Set the working directory
WORKDIR /app

# Copy package.json and package-lock.json
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production

# Create a non-root user first
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nodejs -u 1001

# Copy the rest of the application code
COPY . .

# Create data directory for persistent storage
RUN mkdir -p /app/data

# Ensure devices.json exists and has proper permissions
RUN touch /app/data/devices.json && \
    chmod 666 /app/data/devices.json

# Change ownership of the app directory to the nodejs user
RUN chown -R nodejs:nodejs /app

# Switch to the non-root user
USER nodejs

# Expose the port that the app runs on
# Hugging Face Spaces expects the app to run on port 7860
EXPOSE 7860

# Set environment variables
ENV NODE_ENV=production
ENV PORT=7860

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:7860', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) })"

# Start the application
CMD ["node", "server.js"]