FROM node:20-alpine
WORKDIR /app

# Build deps for sharp on alpine
RUN apk add --no-cache python3 make g++ libc6-compat vips-dev

# Install dependencies first (better layer caching)
COPY server/package*.json ./server/
WORKDIR /app/server
RUN npm install --production

# Copy the rest of the app (frontend + backend)
WORKDIR /app
COPY . .
WORKDIR /app/server

EXPOSE 4000
CMD ["npm", "start"]