Restore production `/var/www/html/sites/default/files` in `install-local-migrate.md`

[Digital-Grinnell]

Issue description

Working through the install-local-migrate.md document and Step 0 instructs us to make a copy of our production /var/www/html/sites/default/files directory and says "You'll move this directory in later steps." I can't find any place later in the document where this directory is moved.

For an issue, describe steps to reproduce the issue

Presumably in any OS, follow the steps outlined in the subject document.

What's the expected result?

At some point it seems like the backup copy of the production /var/www/html/sites/default/files directory should be copied into the new migration instance of ISLE.

What's the actual result?

At the end of the documented process my apache container shows the following at /var/www/html/sites/default/files:

drwxr-xr-x  7 root      root     224 Sep 10 15:54 ./
drwxr-x---  7 islandora www-data  224 Sep 10 15:54 ../
drwxr-x---  3 islandora www-data 96 Sep 10 15:54 bootstrap/
drwxr-x--- 18 islandora www-data 576 Sep 10 15:54 css/
-rw-r-----  1 islandora www-data 476 Sep 10 15:54 .htaccess
drwxr-x--- 18 islandora www-data 576 Sep 10 15:54 js/
drwxr-x---  2 islandora www-data 64 Sep 10 15:54 schemas/

None of my production '/var/www/html/sites/default/files` content is present.

Additional details / screenshots

I have a suggested addition to Step 9 that is documented in my annotated copy of the document. See Step 9 in this blog post for details.

[g7morris]

@McFateM & @SummittDweller ^ It would be great to get this in for this month's ISLE 1.5.6 release however that link you provided uses localhost? Could you submit a PR instead for the documentation fix please or the appropriate link? Then @marksandford & @dwk2 could review too?