fix: Change BackOffice Dockerfile to nginx runtime for Blazor WASM

- Changed from aspnet to nginx:alpine
- Copy wwwroot output instead of BackOffice.dll
- Configure nginx SPA routing (try_files for client-side routing)
- Remove ENTRYPOINT dotnet command

src/BackOffice/Dockerfile

@@ -1,17 +1,35 @@
 FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
 WORKDIR /src
+
+# Copy NuGet config and project file
 COPY ["BackOffice/NuGet.config", "NuGet.config"]
 COPY ["BackOffice/BackOffice.csproj", "BackOffice/"]
+
+# Restore dependencies
 RUN dotnet restore "BackOffice/BackOffice.csproj" --configfile NuGet.config
+
+# Copy all source code
 COPY . .
+
+# Build and publish
 WORKDIR "/src/BackOffice"
-RUN dotnet publish "./BackOffice.csproj" -c Release -o /app/publish
+RUN dotnet publish "BackOffice.csproj" -c Release -o /app/publish
 
+# Runtime stage - nginx for Blazor WebAssembly
+FROM nginx:alpine AS final
+WORKDIR /usr/share/nginx/html
 
-FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS runtime
-WORKDIR /app
-COPY --from=build /app/publish .
-ENV ASPNETCORE_URLS=http://+:8080
-EXPOSE 8080
-ENTRYPOINT ["dotnet", "BackOffice.dll"]
+# Copy published wwwroot (Blazor WASM output)
+COPY --from=build /app/publish/wwwroot .
 
+# Configure nginx for SPA routing
+RUN echo 'server { \
+    listen 80; \
+    server_name _; \
+    location / { \
+        root /usr/share/nginx/html; \
+        try_files $uri $uri/ /index.html; \
+    } \
+}' > /etc/nginx/conf.d/default.conf
+
+EXPOSE 80