Add digital catalog with shareable flipbook and ktg.montzar.ir deploy files.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/magic.ts

@@ -0,0 +1,19 @@
+/** JPEG SOI: FF D8 FF */
+export function isJpeg(buffer: Buffer): boolean {
+  return (
+    buffer.length >= 3 &&
+    buffer[0] === 0xff &&
+    buffer[1] === 0xd8 &&
+    buffer[2] === 0xff
+  );
+}
+
+export function isPng(buffer: Buffer): boolean {
+  return (
+    buffer.length >= 8 &&
+    buffer[0] === 0x89 &&
+    buffer[1] === 0x50 &&
+    buffer[2] === 0x4e &&
+    buffer[3] === 0x47
+  );
+}