# --- Stufe 1: Bauen ---
FROM node:latest AS builder
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build

# --- Stufe 2: Ausliefern (Der Webserver) ---
FROM nginx:alpine

# HIER IST DIE ÄNDERUNG: Wir kopieren aus /app/build (React-Standard)
COPY --from=builder /app/build /usr/share/nginx/html

# Port 80 freigeben
EXPOSE 80

# Nginx im Vordergrund starten
CMD ["nginx", "-g", "daemon off;"]