feat: add readme

# Ansible Role: NFS Server

Install and configure an NFS server with customizable exports.

## Variables

| Variable | Required | Default | Description |

|----------|----------|---------|-------------|

| `shares` | Yes | `[]` | List of NFS shares to export |

| `shares[].name` | Yes | - | Description of the share |

| `shares[].path` | Yes | - | Directory path to export |

| `shares[].client_ip` | Yes | - | Client IP address or network |

| `shares[].client_options` | Yes | - | NFS export options |

| `shares[].owner` | No | `root` | Directory owner |

| `shares[].group` | No | `root` | Directory group |

| `shares[].mode` | No | `0770` | Directory permissions |

## Example

```yaml

shares:

  # production data

  - name: "production data"

    path: "/srv/nfs/production"

    client_ip: "10.0.0.0/24"

    client_options: "rw,sync,no_subtree_check"

    owner: "nobody"

    group: "nogroup"

    mode: "0775"

  # backup storage

  - name: "backup storage"

    path: "/srv/nfs/backups"

    client_ip: "10.0.1.100"

    client_options: "rw,no_root_squash,no_subtree_check"

    owner: "backup"

    group: "backup"

    mode: "0700"

```