Cloud RunにDockerを利用してNext.jsのweb appをデプロイ

# === base
FROM node:22-slim AS base

# === deps
FROM base AS deps

WORKDIR /app

COPY package* . 

RUN npm install

# === builder
FROM base AS builder

WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules

COPY . .

RUN npm run build

# === prod deps
FROM base AS prod_deps

WORKDIR /app

COPY --from=deps /app/package* ./
COPY --from=deps /app/node_modules ./node_modules

RUN npm ci --omit=dev

# === runner
FROM gcr.io/distroless/nodejs22-debian12 AS runner

WORKDIR /app

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

COPY --from=prod_deps --chown=nonroot:nonroot /app/package* ./
COPY --from=prod_deps --chown=nonroot:nonroot /app/node_modules ./node_modules
COPY --from=builder --chown=nonroot:nonroot /app/public ./public
COPY --from=builder --chown=nonroot:nonroot /app/.next ./.next

USER nonroot

EXPOSE 3000

CMD ["node_modules/.bin/next", "start"]

Dockerfile
.dockerignore
node_modules
npm-debug.log
README.md
.next
.git