diff --git a/ui/Dockerfile b/ui/Dockerfile
index deace79..2db4dc4 100644
--- a/ui/Dockerfile
+++ b/ui/Dockerfile
@@ -1,10 +1,20 @@
-# planilla/ui/Dockerfile
+########## builder ##########
 FROM node:18-alpine AS build
 WORKDIR /app
-COPY package*.json ./
-RUN npm install
-COPY . .
-RUN npm run build
 
+# ─── manifests de todo el monorepo ───
+COPY package*.json ./                     # raíz
+COPY ui/package*.json ./ui/               # propio
+# (si tu ui depende de algo en core, agent, etc. copiá también sus package.json)
+
+# npm entiende workspaces porque ve el manifest raíz
+RUN npm ci --workspaces --include-workspace-root --omit=dev
+
+# ─── código fuente ───
+COPY ui ./ui
+RUN npm run --prefix ui build             # usa scripts del paquete ui
+
+########## runtime ##########
 FROM nginx:alpine
-COPY --from=build /app/dist /usr/share/nginx/html
+COPY --from=build /app/ui/dist /usr/share/nginx/html
+EXPOSE 80