Apache shows it works page even if i change the path of document root

My Probleme, is when i put wordpress.local.fr, to display welcome page of my wordpress, it shows me always it works page.

but when i make wordpress.local.fr/wordpress it works

and this is what i have done :

Ip Adresse of ubuntu server : 192.168.52.130

In etc/apache2/sites-available/wordpress

<VirtualHost *:80>
    ServerAdmin wordpress.local.fr
    DocumentRoot /var/www/wordpress
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

etc/hosts :

192.168.52.130 wordpress.local.fr
# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

hosts windows :

192.168.52.130 wordpress.local.fr

wordpress folder contain all my files there is no children folder and i have used samba to share /var/www/ between windows and ubuntu server

[Share]
  comment = Shared
  path    = /var/www/
  browseable = yes
  read only = no
  guest ok = yes
  writeable = yes

I don’t know where I am going wrong.
what can i check and change ?

Edit

I have tried to make just a txt file in fileindex folder instead my wordpress project and making in DocumentRoot /var/www/fileindex always i have the it works page so the DocumentRoot is not taken into account

my htaccess file (in my wordpress/ folder) it was :

# BEGIN WordPress
# END WordPress

I have edited my htaccess file (in my wordpress/ folder). to that :

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wordpress/
RewriteRule ^index.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

I have changed my serverAdmin to serverName like that :

<VirtualHost *:80>
    ServerName wordpress.local.fr
    DocumentRoot /var/www/wordpress/
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

after restarting my apache it still the same probleme

Thanks by advance