Upgrade to Laravel 5.8 and AdminLTE3

resources/js/components/ExampleComponent.vue

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+<template>
+    <div class="container">
+        <div class="row justify-content-center">
+            <div class="col-md-8">
+                <div class="card">
+                    <div class="card-header">Example Component</div>
+
+                    <div class="card-body">
+                        I'm an example component.
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</template>
+
+<script>
+    export default {
+        mounted() {
+            console.log('Component mounted.')
+        }
+    }
+</script>