update docs for NAS gateway (#5569)

docs/shared-backend/DESIGN.md

@@ -25,12 +25,12 @@ Example 1: Start Minio instance on a shared backend mounted and available at `/p
 
 On linux server1
 ```shell
-minio server /path/to/nfs-volume
+minio gateway nas /path/to/nfs-volume
 ```
 
 On linux server2
 ```shell
-minio server /path/to/nfs-volume
+minio gateway nas /path/to/nfs-volume
 ```
 
 ### Windows 2012 Server
@@ -39,24 +39,24 @@ Example 1: Start Minio instance on a shared backend mounted and available at `\\
 
 On windows server1
 ```cmd
-minio.exe server \\remote-server\cifs\data
+minio.exe gateway nas \\remote-server\cifs\data
 ```
 
 On windows server2
 ```cmd
-minio.exe server \\remote-server\cifs\data
+minio.exe gateway nas \\remote-server\cifs\data
 ```
 
 Alternatively if `\\remote-server\cifs` is mounted as `D:\` drive.
 
 On windows server1
 ```cmd
-minio.exe server D:\data
+minio.exe gateway nas D:\data
 ```
 
 On windows server2
 ```cmd
-minio.exe server D:\data
+minio.exe gateway nas D:\data
 ```
 
 Architecture

docs/shared-backend/README.md

@@ -36,7 +36,7 @@ You'll need the path to the shared volume, e.g. `/path/to/nfs-volume`. Then run
 ```sh
 export MINIO_ACCESS_KEY=<ACCESS_KEY>
 export MINIO_SECRET_KEY=<SECRET_KEY>
-minio server /path/to/nfs-volume
+minio gateway nas /path/to/nfs-volume
 ```
 
 #### Minio shared mode on Windows 2012 Server
@@ -46,7 +46,7 @@ You'll need the path to the shared volume, e.g. `\\remote-server\smb`. Then run
 ```cmd
 set MINIO_ACCESS_KEY=my-username
 set MINIO_SECRET_KEY=my-password
-minio.exe server \\remote-server\smb\export
+minio.exe gateway nas \\remote-server\smb\export
 ```
 
 *Windows Tip*
@@ -57,7 +57,7 @@ If a remote volume, e.g. `\\remote-server\smb` is mounted as a drive, e.g. `M:\`
 set MINIO_ACCESS_KEY=my-username
 set MINIO_SECRET_KEY=my-password
 net use m: \\remote-server\smb\export /P:Yes
-minio.exe server M:\export
+minio.exe gateway nas M:\export
 ```
 
 ## 3. Test your setup

docs/zh_CN/shared-backend/README.md

@@ -35,7 +35,7 @@ Minio共享模式是为了解决在真实场景中存在的一些问题，而且
 ```sh
 export MINIO_ACCESS_KEY=<ACCESS_KEY>
 export MINIO_SECRET_KEY=<SECRET_KEY>
-minio server /path/to/nfs-volume
+minio gateway nas /path/to/nfs-volume
 ```
 
 #### Minio shared mode on Windows 2012 Server
@@ -45,7 +45,7 @@ minio server /path/to/nfs-volume
 ```cmd
 set MINIO_ACCESS_KEY=my-username
 set MINIO_SECRET_KEY=my-password
-minio.exe server \\remote-server\smb\export
+minio.exe gateway nas \\remote-server\smb\export
 ```
 
 *Windows提示*
@@ -56,7 +56,7 @@ minio.exe server \\remote-server\smb\export
 set MINIO_ACCESS_KEY=my-username
 set MINIO_SECRET_KEY=my-password
 net use m: \\remote-server\smb\export /P:Yes
-minio.exe server M:\export
+minio.exe gateway nas M:\export
 ```
 
 ## 3. 验证