Finish first part of creating the full list of routes

astro/src/lib/hash.ts

@@ -0,0 +1,12 @@
+import md5 from "md5";
+
+export function getPhotoHash(photo: PhotoAlbumPhoto) {
+    const hash = md5(JSON.stringify({
+        id: photo.id,
+        url: photo.photo.url,
+        width: photo.photo.width,
+        height: photo.photo.height
+    }));
+
+    return hash.substring(hash.length - 10);
+}