Silent installer for linux

[RenNagasaki]

Modify atsetup.sh to accomodate '-silent' option.

[erew123]

Hi @RenNagasaki

Hope you are keeping well! Im on ultra short availability atm, so little time to test/verify. Small things like this Im happy to pull in now, anything bigger that I have to test, is a bit more as/when I can free myself up. Just letting you know so you dont think Im being strangely selective on what I do/dont pull in at this time! :)

[RenNagasaki]

Hi @RenNagasaki

Hope you are keeping well! Im on ultra short availability atm, so little time to test/verify. Small things like this Im happy to pull in now, anything bigger that I have to test, is a bit more as/when I can free myself up. Just letting you know so you dont think Im being strangely selective on what I do/dont pull in at this time! :)

All good. I'm not in a rush. I can checkout my branches anyway if I NEED any of the changes.

I'm just sooo happy the docker image is ready.