initial commit

frontend/Dockerfile

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+# ── Stage 1: build the React app ─────────────────────────────────────────────
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci
+
+COPY public/ ./public/
+COPY src/ ./src/
+
+# API calls are proxied by nginx so no REACT_APP_API_URL needed
+RUN npm run build
+
+# ── Stage 2: serve with nginx ─────────────────────────────────────────────────
+FROM nginx:alpine
+
+COPY --from=builder /app/build /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]