Create SFTP User to connect and chroot it to only one subfolder ( using public , private key authentication instead of password

Question

I have Ubuntu 16.04 server and i need to create a user account on the server which connect via sftp and must be restricted to one specific folder inside the Home directory.

I will need to use the public private key authentication for user to authenticate with server instead of password.

thats what i have done.

• Created the User account.
• created .ssh directory with inside the home directory of user.

mkdir -p ~/.ssh

• copy the public key of the remote client which will be connecting my server inside the .ssh directory.

• created the another Directory inside the home folder.

  mkdir -p ~/allowed-for-sftp-connection

• and from the remote host i can easily make the connection to ubuntu server but with this connection i can as well see the content of .ssh directory which i don't want.

can someone please help me out , how can i get this task done.