fix building frontend

Dockerfile

@@ -1,14 +1,19 @@
+# Stage 1: Build frontend
+FROM node:20-alpine AS frontend-build
+WORKDIR /app
+COPY ./src/GreenHome.Web/package*.json ./
+RUN npm ci --ignore-scripts || npm install
+COPY ./src/GreenHome.Web/ .
+RUN npm run build
+
+# Stage 2: Build backend
 FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
 WORKDIR /src
 
-# Install Node.js and build tools for native modules
-RUN apt-get update && apt-get install -y nodejs npm python3 make g++ && rm -rf /var/lib/apt/lists/*
-
 COPY ./src/ .
 
-# Use npm ci for clean install based on package-lock.json
-RUN cd ./GreenHome.Web && \
-    npm ci
+# Copy built frontend from previous stage
+COPY --from=frontend-build /app/dist /src/GreenHome.Api/wwwroot/
 
 RUN dotnet restore --verbosity detailed
 RUN dotnet publish -c Release -o /app

src/GreenHome.Api/GreenHome.Api.csproj

@@ -28,12 +28,4 @@
     <ProjectReference Include="..\GreenHome.AI.DeepSeek\GreenHome.AI.DeepSeek.csproj" />
   </ItemGroup>
 
-  <Target Name="BuildFrontend" BeforeTargets="Build" Condition="'$(Configuration)' == 'Release' And Exists('..\GreenHome.Web\package.json')">
-    <Exec Command="npm run build" WorkingDirectory="..\GreenHome.Web" />
-    <ItemGroup>
-      <FrontendDist Include="..\GreenHome.Web\dist\**\*" />
-    </ItemGroup>
-    <Copy SourceFiles="@(FrontendDist)" DestinationFiles="@(FrontendDist->'wwwroot\%(RecursiveDir)%(Filename)%(Extension)')" SkipUnchangedFiles="true" />
-  </Target>
-
 </Project>