Add Hardware recommendations to the documentation

[pnbecker]

Hi,

I cannot find any information in the documentation about hardware recommendations to run digilib. Of course, this highly depends on the concrete use case. Nevertheless, could you please add rough ideas about the hardware requirements that digilib demands? Maybe you can describe two or three use cases and the hardware digilib requires for them?

Thank you! Pascal

[robcast]

I can describe the hardware we use to run digilib (I have to look up our request statistics...). Performance depends a lot your images and the requests you get of course.