Move validators to seperate thread, other fixes (#253)

* Move validators to seperate thread, other fixes

* Update rust version in Dockerfile

* Fix notifs not working

* Fix pack validator not enforcing files

src/database/models/categories.rs

@@ -14,6 +14,7 @@ pub struct Loader {
     pub supported_project_types: Vec<String>,
 }
 
+#[derive(Clone)]
 pub struct GameVersion {
     pub id: GameVersionId,
     pub version: String,