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fix: bind Next server to all container interfaces
2026-08-17 17:03:41 +02:00

56 lines
1.3 KiB
Docker
Executable File

# Multi-stage build for Next.js application
# Stage 1: Build stage
FROM node:20-alpine AS builder
WORKDIR /app
# NEXT_PUBLIC_* vars are inlined at build time — must be passed as build args
ARG NEXT_PUBLIC_SITE_URL
ENV NEXT_PUBLIC_SITE_URL=$NEXT_PUBLIC_SITE_URL
# Copy package files
COPY package.json package-lock.json* ./
# Install dependencies
RUN npm ci --prefer-offline --no-audit
# Copy source code
COPY . .
# Build the application
RUN npm run build
# Stage 2: Production runtime
FROM node:20-alpine AS runner
WORKDIR /app
# Set production environment
ENV NODE_ENV=production
# Next standalone otherwise inherits Docker's container-ID HOSTNAME and only binds
# to the container IP. Bind explicitly to all interfaces for port publishing and healthchecks.
ENV HOSTNAME=0.0.0.0
# Create non-root user for security
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs
# Copy built application from builder stage
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public
# Change ownership to non-root user
RUN chown -R nextjs:nodejs /app
USER nextjs
# Expose port
EXPOSE 3000
# Health check
HEALTHCHECK --interval=30s --timeout=5s --retries=5 \
CMD wget -qO- http://127.0.0.1:3000/api/health || exit 1
# Start the application
CMD ["node", "server.js"]