create webp variant

process-image.ts

@@ -42,7 +42,7 @@ export async function processImage(
     thumb,
     thumb.length,
     {
-      "Content-Type": "image/jpeg",
+      "Content-Type": mime,
       "x-amz-meta-processed": "true",
     }
   );
@@ -54,7 +54,19 @@ export async function processImage(
     optimized,
     optimized.length,
     {
-      "Content-Type": "image/jpeg",
+      "Content-Type": mime,
+      "x-amz-meta-processed": "true",
+    }
+  );
+
+  const webp = await sharp(buffer).webp({ quality: 80 }).toBuffer();
+  await minio.putObject(
+    bucket,
+    `${filePath}/webp/${fileName?.replace(/\.[^/.]+$/, ".webp")}`,
+    webp,
+    webp.length,
+    {
+      "Content-Type": "image/webp",
       "x-amz-meta-processed": "true",
     }
   );