在您的 dockerfile 中，您指向一个新用户 dockuser.

In your dockerfile, you are pointing to a new user dockuser.

RUN adduser -D dockuser
USER dockuser

因此，您的容器将以用户 dockuser 开头，该用户似乎没有运行 /manage.py 的适当权限.

Hence your container will start with user dockuser which don't seems to have proper permissions to run /manage.py.

你可以

• 删除您创建并指向的上述行dockuser.

或

• 在/manage.py 文件的 dockerfile 中使用 chown 和 chmod 命令为用户 dockuser 提供适当的权限.

• provide appropriate permission to user dockuser using chown and chmod commands in your dockerfile for /manage.py file.

我在这里回答了类似的问题.

I have answered such similar question here.