gulp.task('deploy-prod', function () {
    return gulp.src('dist/**')
        .pipe(sftp({
            host: '000.000.000.000',
            user: 'user',
            pass: 'pass',
            remotePath: '/var/www/html/meusite/',
            port: 22
        }))
        .pipe(gulp.dest('dist'));
});

$ gulp deploy-prod

$ gulp deploy --prod

$ gulp deploy --homolog