文件上传功能添加，注意使用Path.Combine处理通用路径问题（windows||docker)

CloudBuilder/CloudBuilder.Web.Entry/Dockerfile

@@ -24,6 +24,7 @@ RUN dotnet publish "./CloudBuilder.Web.Entry.csproj" -c $BUILD_CONFIGURATION -o
 # 此階段用於生產環境，或以一般模式從 VS 執行時 (未使用偵錯設定時的預設值)
 FROM base AS final
 WORKDIR /app
+RUN apt-get update && apt-get install -y --no-install-recommends ffmpeg && rm -rf /var/lib/apt/lists/*
 COPY --from=publish /app/publish .
 COPY ./dist ./dist
 ENTRYPOINT ["dotnet", "CloudBuilder.Web.Entry.dll"]