baidunetdisk在arm版飞牛os上跑不起来，优化环境变量

[WGKER]

类似这样的报错：
[cont-env ] DOCKER_IMAGE_PLATFORM: executing...
[cont-env ] DOCKER_IMAGE_PLATFORM: /etc/cont-env.d/DOCKER_IMAGE_PLATFORM: 1: linux/arm64: not found
[cont-env ] DOCKER_IMAGE_PLATFORM: terminated with error 127.

[cont-init ] 10-init-users.sh: /etc/cont-groups.d/root/id: 1: 0: not found
[cont-init ] 10-init-users.sh: ERROR: /etc/cont-groups.d/root/id terminated with error 127.
[cont-init ] 10-init-users.sh: terminated with error 1.

这个镜像用的是 LinuxServer.io 标准容器结构，它依赖两个目录：
/etc/cont-env.d/
/etc/cont-groups.d/
这两个目录里全是纯文本值文件，飞牛OS强行全部当脚本执行，直接炸了，没法一个一个把内容改成export赋值，太多了

期待构建镜像时优化兼容性，感谢大佬

[tckxjzc]

环境变量加上“S6_STAGE2_HOOK=/bin/true”就行了