fix: update Dockerfile for multi-project solution structure

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

MoneyMap/Dockerfile

@@ -2,9 +2,11 @@
 FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 WORKDIR /src
 
-# Copy csproj and restore dependencies
-COPY MoneyMap.csproj .
-RUN dotnet restore
+# Copy solution and project files for restore
+COPY MoneyMap.sln .
+COPY MoneyMap/MoneyMap.csproj MoneyMap/
+COPY MoneyMap.Core/MoneyMap.Core.csproj MoneyMap.Core/
+RUN dotnet restore MoneyMap/MoneyMap.csproj
 
 # Install libman CLI for client-side library restore
 RUN dotnet tool install -g Microsoft.Web.LibraryManager.Cli
@@ -12,6 +14,7 @@ ENV PATH="${PATH}:/root/.dotnet/tools"
 
 # Copy everything else and build
 COPY . .
+WORKDIR /src/MoneyMap
 RUN libman restore
 RUN dotnet publish -c Release -o /app/publish