Upgrade akaunting with composer

src/freedombone-app-akaunting

     function_check set_repo_commit
     set_repo_commit /var/www/$AKAUNTING_DOMAIN_NAME/htdocs "akaunting commit" "$AKAUNTING_COMMIT" $AKAUNTING_REPO
 
+    cd /var/www/$AKAUNTING_DOMAIN_NAME/htdocs
+    install_composer
+
     chown -R www-data:www-data /var/www/${AKAUNTING_DOMAIN_NAME}/htdocs
 }