Dockerfile.frontend

# syntax=docker/dockerfile:1

# ── Build stage ──────────────────────────────────────────────────────────────
FROM node:20-alpine AS builder

WORKDIR /app

# Install build dependencies
RUN apk add --no-cache python3 make g++

# Copy workspace files
COPY package*.json ./
COPY frontend/package*.json ./frontend/

# Install dependencies
RUN npm install --legacy-peer-deps

# Copy source code
COPY frontend ./frontend

# Build application
WORKDIR /app/frontend
RUN npm run build

# ── Runtime stage ────────────────────────────────────────────────────────────
FROM node:20-alpine

WORKDIR /app

# Install dumb-init for proper signal handling
RUN apk add --no-cache dumb-init

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

# Copy built application from builder
COPY --from=builder --chown=nextjs:nodejs /app/frontend/.next ./frontend/.next
COPY --from=builder --chown=nextjs:nodejs /app/frontend/public ./frontend/public
COPY --from=builder --chown=nextjs:nodejs /app/frontend/package*.json ./frontend/

# Install only production dependencies
WORKDIR /app/frontend
RUN npm ci --only=production && npm cache clean --force

# Switch to non-root user
USER nextjs

EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000', (r) => {if (r.statusCode !== 200) throw new Error(r.statusCode)})"

ENTRYPOINT ["dumb-init", "--"]
CMD ["npm", "start"]