Dockerfile

FROM node:18-bookworm AS base

# Install dependencies only when needed
FROM base AS deps
WORKDIR /app

# Copy package files
COPY package*.json ./
RUN npm ci

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Set the API base URL as a build argument
ARG NEXT_PUBLIC_API_BASE=http://localhost:8000
ENV NEXT_PUBLIC_API_BASE=$NEXT_PUBLIC_API_BASE

# Build the application
RUN npm run build

# Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN apt-get update && apt-get install -y \
    dumb-init \
    wget \
    socat \
    nodejs \
    && rm -rf /var/lib/apt/lists/*

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Create empty public directory (Next.js app doesn't have one)
RUN mkdir -p ./public

# Set the correct permission for prerender cache
RUN mkdir .next
RUN chown nextjs:nodejs .next

# Automatically leverage output traces to reduce image size
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

COPY ./scripts ./scripts

USER nextjs

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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

CMD ["node", "server.js"]