Dockerfile

# Build stage
FROM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install all dependencies (including dev for Tailwind build)
RUN npm ci

# Copy source files
COPY . .

# Build Tailwind CSS
RUN npm run css:build

# Production stage
FROM node:20-alpine

WORKDIR /app

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

# Copy package files
COPY package*.json ./

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

# Copy built assets from builder
COPY --from=builder /app/public/css/styles.css ./public/css/styles.css

# Copy application files
COPY server.js ./
COPY src ./src
COPY public ./public

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

# Switch to non-root user
USER nodejs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:3000/ || exit 1

# Start the application
CMD ["node", "server.js"]