make ID only 12 chars long.

internal/room/containers.go

@@ -19,7 +19,7 @@ func (manager *RoomManagerCtx) containerToEntry(container dockerTypes.Container)
 	}
 
 	entry := &types.RoomEntry{
-		ID:             container.ID,
+		ID:             container.ID[:12],
 		URL:            labels.URL,
 		Name:           labels.Name,
 		NekoImage:      labels.NekoImage,

internal/room/manager.go

@@ -483,7 +483,7 @@ func (manager *RoomManagerCtx) Create(settings types.RoomSettings) (string, erro
 		return "", err
 	}
 
-	return container.ID, nil
+	return container.ID[:12], nil
 }
 
 func (manager *RoomManagerCtx) GetEntry(id string) (*types.RoomEntry, error) {