FROM node:20-alpine AS builder

WORKDIR /app

COPY package*.json ./
RUN npm ci

COPY . .

# NEXT_PUBLIC_API_URL はビルド時に埋め込まれる
ARG NEXT_PUBLIC_API_URL=https://main.keinafarm.net
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}

RUN npm run build

# --- 実行ステージ ---
FROM node:20-alpine

WORKDIR /app

COPY --from=builder /app/package*.json ./
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/node_modules ./node_modules

EXPOSE 3000

CMD ["npm", "start"]