FROM node:20-alpine AS builder

# Install pnpm
RUN corepack enable && corepack prepare pnpm@latest --activate

WORKDIR /app

# Install dependencies
COPY package.json pnpm-lock.yaml ./
RUN pnpm install --frozen-lockfile

# Copy source and build
COPY . .
RUN pnpm run build

# Prune dev dependencies
RUN pnpm prune --prod

# --- Production image ---
FROM node:20-alpine

USER 1000
WORKDIR /app

COPY --from=builder --chown=1000 /app/build ./build
COPY --from=builder --chown=1000 /app/node_modules ./node_modules
COPY --from=builder --chown=1000 /app/package.json ./

EXPOSE 3000

CMD ["node", "build"]