grid mostly there

src/model.ts

@@ -0,0 +1,11 @@
+export const SIZES = [1600, 1200, 800, 600, 400, 200];
+export const URL = "img/data.json";
+
+export interface Images {
+    [name: string]: Image
+}
+
+export interface Image {
+    height: number;
+    width: number;
+}