What am I trying to do exactly ?

Move my WP website available at example.com to example.com/subdir but I don’t want to make it available on example.com

Why would I want to do such a thing ?

I want an “under construction” webpage on “example.com”, but people (that I’ve chosen before) with the link of /subdir could access to it. In that way, visitors can still see a website and my client could as well see where am I in the process of website making.

What have I been trying ?

I’ve read all stackoverflow’s post talking about something like that but nothing helped me so far.
I’ve done everything following tutorials available online ;

• Found & replaced example.com to example.com/subdir using WP Migrate DB plugin
• Using FTP, made a “subdir” folder & moved everything in it
• Added two lines containing siteurl & wpurl into wp-config.php
• Checked the “permalink” setting

  Even without trying to make a maintenance webpage, like the tutorials do, by copying/pasting .htaccess & index.php into /subdir/../, the trick won’t work as well

  Thanks in advance.