Dockerfile

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

# Set the working directory in the container
WORKDIR /app

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

# Copy package.json and package-lock.json (if available)
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production && npm cache clean --force

# Copy the rest of the application code
COPY . .

# Create uploads directory and set permissions
RUN mkdir -p uploads && chown -R nodejs:nodejs /app

# Switch to non-root user
USER nodejs

# Expose the port the app runs on
EXPOSE 3000

# Define environment variable
ENV NODE_ENV=production

# Add health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node healthcheck.js

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