Dashboard Leads - version limpia para servidor (.env y config de despliegue restaurados)

frontend/Dockerfile

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+# ── Etapa 1: build del frontend con Vite ──
+FROM node:20-alpine AS build
+
+WORKDIR /app
+
+COPY package.json package-lock.json* ./
+RUN npm ci --no-audit --no-fund || npm install --no-audit --no-fund
+
+COPY . .
+RUN npm run build
+
+# ── Etapa 2: servir el build con nginx ──
+FROM nginx:alpine
+
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]