Dockerfile

# Dockerfile — Multi-stage build for GCP Cloud Run
# Requires next.config.ts: output: 'standalone'

# Stage 1: Install dependencies
FROM node:20-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# Stage 2: Build the application
FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
# .env.local is excluded by .dockerignore — production env vars come from Cloud Run secrets
RUN npm run build

# Stage 3: Minimal production runner
# Uses Next.js standalone output — no full node_modules needed
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV HOSTNAME=0.0.0.0
ENV PORT=3000

# standalone output is self-contained
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public

EXPOSE 3000
CMD ["node", "server.js"]