FROM node:18-alpine

# Set working directory
WORKDIR /app

# Copy package files and install dependencies
COPY package*.json ./
RUN npm install --silent

# Copy source code
COPY . .

# Expose port
EXPOSE 3000

# Health check using Node.js script
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
  CMD node healthcheck.js

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