@forge/cli

Index: package/out/service/resources-uploader-service.js
===================================================================
--- package/out/service/resources-uploader-service.js
+++ package/out/service/resources-uploader-service.js
@@ -27,10 +27,13 @@
         Object.entries(preSignedUrl.uploadFormData).forEach(([k, v]) => {
             formData.append(k, v);
         });
         formData.append('file', content);
-        const body = new Uint8Array(formData.getBuffer());
-        const headers = formData.getHeaders();
+        const body = formData.getBuffer();
+        const headers = {
+            ...formData.getHeaders(),
+            'content-length': body.length.toString()
+        };
         const response = await (0, cli_shared_1.sendWithNodeRequest)({
             method: 'POST',
             url: preSignedUrl.uploadUrl,
             headers,