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