[Pharo-users] Read-only images / how to deploy new image as fast as possible?

Hi, I came to the phase where I actually deploy the small backend written in Pharo, and I wonder about two things: 1. Is it possible to make .image / .changes read-only? Will Pharo just work (not writing the image, but that is not needed, all data are in sqlite file)? 2. How to "switch" images as fast as possible? I presume there is no way to tell vm to "stop doing this and reload different image" or something like that? I need to stop the runninng one and then start the new one? Or is it possible to "swap" the read-only image for new one and tell VM to reload (just wanting to minimize the off-time). Thanks, Herby