<VirtualHost *:81>
 ServerAdmin webmaster@localhost
 DocumentRoot /home/user/qgis_projects

 ErrorLog ${APACHE_LOG_DIR}/qgis-server-error.log
 CustomLog ${APACHE_LOG_DIR}/qgis-server-access.log combined

 FcgidIOTimeout 120
 FcgidInitialEnv LC_ALL "pl_PL.UTF-8"
 FcgidInitialEnv PYTHONIOENCODING UTF-8
 FcgidInitialEnv LANG "pl_PL.UTF-8"
 FcgidInitialEnv QGIS_DEBUG 1
 FcgidInitialEnv QGIS_SERVER_LOG_FILE /tmp/qgis-000.log
 FcgidInitialEnv QGIS_SERVER_LOG_LEVEL 0
 FcgidInitialEnv QGIS_PLUGINPATH "/opt/qgis-server/plugins"
 FcgidInitialEnv QGIS_PROJECT_FILE "/home/user/qgis_projects/some_default_project.qgs"
 SetEnv QGIS_PROJECT_FILE "/home/user/qgis_projects/some_default_project.qgs"

 ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
 <Directory "/usr/lib/cgi-bin">
     AllowOverride All
     Options +ExecCGI -MultiViews +FollowSymLinks
     Require all granted
     PassEnv QGIS_PROJECT_FILE
 </Directory>

</VirtualHost>