LaRecipe publishes a set of blade files that you can edit. These files can be found in:
resources/views/vendor/larecipe/partials404
The 404.blade.php file contains the image and text presented when someone tries to navigate to a page in your documentation that doesn't exist.
Logo
The logo.blade.php file contains the image that is displayed in the top left hand corner of your navigation bar. You can change the code in here to insert, for example, your company logo.
Navigation Bar
The nav.blade.php file contains the code for the navigation bar. If you want to make a change, for example removing the github button, this is the place to do that.
Sidebar
The sidebar.blade.php file is the place where you can customize the sidebar menu. Out of the box this file just looks at your docs/index.md file, but you are free to customize to your hearts content.