update

03_source/frontend/src/utils/file-to-base64.ts

@@ -0,0 +1,12 @@
+export function fileToBase64(file: File): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.readAsDataURL(file);
+    reader.onload = () => {
+      resolve(reader.result as string);
+    };
+    reader.onerror = () => {
+      reject(new Error('Error converting file to base64'));
+    };
+  });
+}