作者回答并提供了如下解决方案：
Revert to v1.5.2 which uses CoreCompat.System.Drawing.v2 for now. v1.5.4 uses Microsoft's System.Drawing.Common library. It's in the preview phase right now.
Install-Package EPPlus.Core -Version 1.5.2
Also you need to install libgdiplus too.
For Ubuntu 16.04 and above:
apt-get install libgdiplus
cd /usr/lib
ln -s libgdiplus.so gdiplus.dll
意思就是从1.5.4降低版本到1.5.2，并且docker镜像中还需要安装软件 libgdiplus ，之后在镜像中创建软链接