$wgFooterIcons['poweredby']['wikibase4research'] = [
    "src" => null, // Add a URL to an image here if available
    "url" => "https://gitlab.com/nfdi4culture/wikibase4research/wikibase4research-docker",
    "alt" => "Wikibase4Research",
    "width" => 88,
    "height" => 31,
];
<br />
<b>Warning</b>:  session_name(): Session name cannot be changed after headers have already been sent in <b>/var/www/html/includes/Setup.php</b> on line <b>479</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/html/LocalSettings.d/05-FooterConfig.php:1) in <b>/var/www/html/includes/Request/WebResponse.php</b> on line <b>80</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/html/LocalSettings.d/05-FooterConfig.php:1) in <b>/var/www/html/includes/Request/WebResponse.php</b> on line <b>80</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/html/LocalSettings.d/05-FooterConfig.php:1) in <b>/var/www/html/includes/Request/WebResponse.php</b> on line <b>80</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/html/LocalSettings.d/05-FooterConfig.php:1) in <b>/var/www/html/includes/Request/WebResponse.php</b> on line <b>80</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/html/LocalSettings.d/05-FooterConfig.php:1) in <b>/var/www/html/includes/Request/WebResponse.php</b> on line <b>80</b><br />