By default, when accessing the main page of the site, the server looks in site root directory File index.php
... If there is no such file, then a search is performed index.html
or index.htm
... If none of the listed files are present, the server returns error 403.
If the main site file has a different name, for example home.php
instead index.php
then in this case you can:
index.php
.DirectoryIndex home.php
You can create and edit this file with filemanager or any FTPclient.