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

# Set working directory in container
WORKDIR /app

# Copy package files first for better layer caching
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production

# Copy application files
COPY . .

# Create directory for SQLite database
RUN mkdir -p /app/data

# Create non-root user for security
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nodejs -u 1001

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

# Expose port 3000
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "const http = require('http'); http.get('http://localhost:3000/', (res) => { process.exit(res.statusCode === 200 ? 0 : 1); }).on('error', () => { process.exit(1); });"

# Start the application
CMD ["npm", "start"]