@UnstableApi
    public ServerBuilder multipartUploadsLocation(Path path) {
        requireNonNull(path, "path");
        virtualHostTemplate.multipartUploadsLocation(path);
        return this;
    }
Sets the {@link Path} for storing upload file through multipart/form-data.

@param path the path of the directory stores the file.
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java