Remove scary "data loss" warning

This is a Container Storage Interface ([CSI](https://github.com/container-storage-interface/spec/blob/master/spec.md)) for S3 (or S3 compatible) storage. This can dynamically allocate buckets and mount them via a fuse mount into any container.

## Status

This is still very experimental and should not be used in any production environment. Unexpected data loss could occur depending on what mounter and S3 storage backend is being used.

## Kubernetes installation

### Requirements

  name: csi-s3-existing-bucket

provisioner: ru.yandex.s3.csi

parameters:

  mounter: rclone

  mounter: geesefs

  bucket: some-existing-bucket-name

```