Dockerfile

FROM node:22-alpine

# Update packages for security patches
RUN apk upgrade --no-cache

# Create non-root user
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nodejs -u 1001

WORKDIR /app

# Copy package files
COPY --chown=nodejs:nodejs package*.json ./

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

# Copy application code
COPY --chown=nodejs:nodejs . .

# Switch to non-root user
USER nodejs

# Expose default port (can be overridden in config.json)
EXPOSE 3000

# Health check - reads port from config.json dynamically
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD node /app/scripts/healthcheck.js

# Run the proxy
CMD ["node", "--no-deprecation", "index.js"]