Docker 打包解决图形验证码不出来的问题

通过docker拉取一个.netcore3.1基础镜像：

docker pull mcr.microsoft.com/dotnet/aspnet:3.1

docker exec -it  app /bin/bash

进入容器部署libgdiplus

apt-get update -y
apt-get install -y libgdiplus
apt-get clean
ln -s /usr/lib/libgdiplus.so /usr/lib/gdiplus.dll

启动镜像：

docker run  -it mcr.microsoft.com/dotnet/aspnet:3.1 /bin/bash

重新打包成一个新的镜像：

docker commit -a="simple" -m="added libgdiplus based on .netcore3.1" 28a66ebccd55 dotnetcore-with-libgdiplus:v3.1

修改项目Dockerfile基础镜像为刚刚构建的自定义镜像dotnetcore-with-libgdiplus:v3.1

FROM dotnetcore-with-libgdiplus:v3.1 AS base

ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

WORKDIR /app
COPY . .
ENTRYPOINT ["dotnet", "CoinCoreNewAdmin.dll"]

 https://www.jb51.cc/docker/1179513.html