Refactor code

src/utils/getImageBufferFromS3.ts

@@ -1,10 +1,10 @@
 import { s3 } from "@/lib/s3";
 import { GetObjectCommand } from "@aws-sdk/client-s3";
-import { Readable } from "stream";
+import type { Readable } from "stream";
 
 export async function getImageBufferFromS3Key(s3Key: string): Promise<Buffer> {
   const command = new GetObjectCommand({
-    Bucket: process.env.BUCKET_NAME!,
+    Bucket: process.env.BUCKET_NAME,
     Key: s3Key,
   });