Confirm if Dockersand .bat and .ps1 need executable bit set

[dpogue]

This is a minor annoyance on Linux, but might turn out to be necessary and not worth fixing.

When I type ./do and hit tab in my terminal, it cannot autocomplete to ./dockersand.sh because it sees 3 files with the executable (+x) bit set and doesn't know which one to use.

I'm reasonably sure Windows doesn't use/preserve that attribute, so I'm pretty certain we don't need it set on dockersand.bat, but I'm less clear about the dockersand.ps1 PowerShell file (since hypothetically someone could choose to run PowerShell on Linux or macOS)