@tus/s3-store: add missing docs for maxMultipartParts

packages/s3-store/README.md

@@ -74,7 +74,14 @@ by setting `partSize` and `minPartSize` to the same value.
 Can not be lower than 5MiB or more than 5GiB.
 
 The server calculates the optimal part size, which takes this size into account, but
-may increase it to not exceed the S3 10K parts limit.
+may increase it to not exceed the `options.maxMultipartParts` parts limit.
+
+#### `options.maxMultipartParts`
+
+The maximum number of parts allowed in a multipart upload. Defaults to 10,000.
+Some S3 providers have non-standard restrictions on the number of parts in a multipart
+upload. For example, AWS S3 has a limit of 10,000 parts, but some S3 compatible providers
+have a limit of 1,000 parts.
 
 #### `options.s3ClientConfig`
 
@@ -226,6 +233,17 @@ const s3Store = new S3Store({
 })
 ```
 
+### Example: use with Scaleway Object Storage
+
+`@tus/s3-store` can be used with Scaleway Object Storage but with some additional configuration. Scaleway Object Storage has a limit of 1000 parts in a multipart upload.
+
+```ts
+const s3Store = new S3Store({
+  maxMultipartParts: 1000,
+  // ...
+})
+```
+
 ## Types
 
 This package is fully typed with TypeScript.