setting the base_url()

For codeIgniter4

On Desktop using spark serve i set mine (app/config/App.php ) to:

public $baseURL = 'http://localhost:8080/';

ON Apache i set up to use 127.0.0.5

public $baseURL = 'http://127.0.0.5/';

for images ,depends where they are if relative to public directory then;
<img class ="img-fluid" src = "<?php echo base_url('images/logo.png'); ?>" >

// images is a directory inside public
so depends where assets dir is ; there are . See the difference in use between my code and yours. Also
note "/" at end of

public $baseURL = 'http://localhost:8080/';

CMS CI4 A CMS system, runs out of the box written on top of CI4

Arch Book  CodeIgniter4 on Apache(pages 92-114) 

CI4-CMS Github