FROM node:18-alpine AS builder

# Set working directory
WORKDIR /app

# Copy package.json and install dependencies
COPY package.json package-lock.json ./
RUN npm ci

# Copy the rest of the app and build
COPY . .
RUN npm run build

# Stage 2: Minimal image for exporting build artifacts
FROM alpine:latest

# Set working directory for output
WORKDIR /output

# Copy the built files from the builder stage
COPY --from=builder /app/build .

# No CMD because this image is just used to extract build files