Update error pages

resources/views/errors/404.blade.php

@@ -2,13 +2,9 @@
 
 @section('content')
 <div class="container">
-  <div class="error-page py-5 my-5">
-    <div class="card mx-5">
-      <div class="card-body p-5 text-center">
-        <h1>Page Not Found</h1>
-        <img src="/img/fred1.gif" class="img-fluid">
-      </div>
-    </div>
+  <div class="error-page py-5 my-5 text-center">
+    <h3 class="font-weight-bold">Sorry, this page isn't available.</h3>
+    <p class="lead">The link you followed may be broken, or the page may have been removed. <a href="/">Go back to Pixelfed.</a></p>
   </div>
 </div>
 @endsection

resources/views/errors/500.blade.php

@@ -2,14 +2,9 @@
 
 @section('content')
 <div class="container">
-  <div class="error-page py-5 my-5">
-    <div class="card mx-5">
-      <div class="card-body p-5 text-center">
-        <h1>Whoops! Something went wrong.</h1>
-        <p class="mb-0 text-muted lead">If you keep seeing this message, please contact an admin.</p>
-        <img src="/img/fred1.gif" class="img-fluid">
-      </div>
-    </div>
+  <div class="error-page py-5 my-5 text-center">
+    <h3 class="font-weight-bold">Something went wrong</h3>
+    <p class="lead">We cannot process your request at this time, please try again later. <a href="/">Go back to Pixelfed.</a></p>
   </div>
 </div>
 @endsection

resources/views/errors/503.blade.php

@@ -2,14 +2,9 @@
 
 @section('content')
 <div class="container">
-  <div class="error-page py-5 my-5">
-    <div class="card mx-5">
-      <div class="card-body p-5 text-center">
-        <h1>Service Unavailable</h1>
-        <p class="mb-0 text-muted lead">Our services are in maintenance mode, please try again later.</p>
-        <img src="/img/fred1.gif" class="img-fluid">
-      </div>
-    </div>
+  <div class="error-page py-5 my-5 text-center">
+    <h3 class="font-weight-bold">Service Unavailable</h3>
+    <p class="lead">Our service is in maintenance mode, please try again later. <a href="/">Go back to Pixelfed.</a></p>
   </div>
 </div>
 @endsection