New app first use

Hello, we have been working on a Meteor app for a while and now we are going to use it for the first time, however we are not going to have it on a public server just yet, but run on a server locally in one of our computers so then other devices in the same network will be able to access it, since this is going to be used for a workshop. My question is, is it okay in terms of performance: does it matter how many people will be able to use the app simultaneously, and is this the best practice to use it for a non-deployed app?