Use the code below:

'rewrite' => array( 
    'slug'          => '.',
    'with_front'    => false 
),

Use the code below:

'rewrite' => array( 
    'slug'          => '.',
    'with_front'    => false 
),

Notice that when you rewrite the slug that the default page template is opened, when you go to the taxonomy page.

Use this:

'rewrite' => array( 'slug' => '.',
                'with_front' => false 
      ),

Use the code below:

'rewrite' => array( 
    'slug'          => '.',
    'with_front'    => false  
),