Dockerfile

# Stage 1: deps
FROM node:20-alpine AS deps
WORKDIR /app
COPY package.json pnpm-lock.yaml ./
RUN npm install -g pnpm && pnpm install --frozen-lockfile

# Stage 2: builder
FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Prisma generate needs DATABASE_URL at build time
ARG DATABASE_URL
ENV DATABASE_URL=$DATABASE_URL

RUN npm install -g pnpm \
    && pnpm prisma generate \
    && pnpm build

# Stage 3: runner
FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production

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"]