Added once again

config/backend.php

+<?php
+
+return [
+
+    /*
+     * Skin for Admin LTE backend theme
+     *
+     * Available options:
+     *
+     * black
+     * black-light
+     * blue
+     * blue-light
+     * green
+     * green-light
+     * purple
+     * purple-light
+     * red
+     * red-light
+     * yellow
+     * yellow-light
+     */
+    'theme' => 'blue-light',
+
+    /*
+     * Layout for the Admin LTE backend theme
+     *
+     * Fixed:               use the class .fixed to get a fixed header and sidebar.
+     *                      This makes scrolling affect the content only and put the sidebar and header in a fixed position.
+     *
+     * Collapsed Sidebar:   use the class .sidebar-collapse to have a collapsed sidebar upon loading.
+     *                      Use this if you want the sidebar to be hidden by default.
+     *
+     * Boxed Layout:        use the class .layout-boxed to get a boxed layout that stretches only to 1250px.
+     *                      Provides spaces on both sides of the screen, if the screen is big enough.
+     *
+     * Top Navigation:      use the class .layout-top-nav to remove the sidebar and have your links at the top navbar.
+     *                      Makes the sidebar hover the content when expanded.
+     *
+     * Sidebar Mini:        Shows the only the icons of the sidebar items when collapsed. Sidebar will not fully collapse.
+     *
+     * Available options:
+     *
+     * fixed
+     * sidebar-collapse
+     * layout-boxed
+     * layout-top-nav
+     * sidebar-mini
+     *
+     * Note: you cannot use both layout-boxed and fixed at the same time. Anything else can be mixed together.
+     */
+    'layout' => 'sidebar-mini',
+];
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