The following VS Code extension will help you:

• SFTP to a Server
• Upload/overwrite files on save

Extension Details

Extension Name: SFTP
Author: Satiro Marra
Documentation: visit

Sample config file:

{
"name": "Site name",
"host": "host name",
"protocol": "sftp",
"port": 9,
"username": "username",
"password": "password",
"remotePath": "//",
"uploadOnSave": false,
"useTempFile": false,
"openSsh": false
}