一些调查发现了一种使用Dockerfile向容器添加字体的方法。我们需要在docker文件下面一行：

I have done some investigation and found a way to add fonts to the container using Dockerfile. We need to below line docker file:

COPY arial * .ttf c：/ windows / fonts /

下面是更新的Dockerfile：

Below is the updated Dockerfile:

# app image
FROM mcr.microsoft.com/dotnet/framework/runtime:4.8-windowsservercore-ltsc2019  AS BASE
COPY arial*.ttf c:/windows/fonts/
COPY . .
ENTRYPOINT BackgroundService.exe