Dockerfile.node

# Node.js WebSocket Relay Dockerfile for Monarchs Chat System
# Multi-stage build for production

# ===================================================================
# Build Stage
# ===================================================================
FROM node:20-alpine AS builder

# Install build dependencies for native modules
RUN apk add --no-cache \
    python3 \
    make \
    g++

# Set working directory
WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production

# ===================================================================
# Production Stage
# ===================================================================
FROM node:20-alpine AS production

# Install runtime dependencies
RUN apk add --no-cache \
    curl \
    ca-certificates \
    tini

# Create non-root user for security
RUN addgroup -g 1000 -S nodejs && \
    adduser -u 1000 -S -G nodejs -s /bin/sh nodejs

# Set working directory
WORKDIR /home/nodejs

# Copy package files
COPY package*.json ./

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

# Copy application source
COPY server.js ./
COPY config.yaml ./

# Set ownership
RUN chown -R nodejs:nodejs /home/nodejs

# Switch to non-root user
USER nodejs

# Expose WebSocket port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8080/health || exit 1

# Environment variables
ENV NODE_ENV=production
ENV HOME=/home/nodejs

# Use tini for proper signal handling
ENTRYPOINT ["/sbin/tini", "--"]

# Start command
CMD ["node", "server.js"]

# Labels
LABEL maintainer="Monarchs Team" \
      version="2.0.0" \
      description="Monarchs Chat System - Node.js WebSocket Relay"

# ===================================================================
# Development Stage (optional)
# ===================================================================
FROM builder AS development

WORKDIR /app

# Copy source code
COPY server.js ./
COPY config.yaml ./

# Install all dependencies including dev
RUN npm install

# Expose ports
EXPOSE 8080

# Development command with hot reload
CMD ["npm", "run", "dev"]