Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/vendor/laravel/ui/stubs/Auth/LoginController.stub

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Foundation\Auth\AuthenticatesUsers;
+
+class LoginController extends Controller
+{
+    /*
+    |--------------------------------------------------------------------------
+    | Login Controller
+    |--------------------------------------------------------------------------
+    |
+    | This controller handles authenticating users for the application and
+    | redirecting them to your home screen. The controller uses a trait
+    | to conveniently provide its functionality to your applications.
+    |
+    */
+
+    use AuthenticatesUsers;
+
+    /**
+     * Where to redirect users after login.
+     *
+     * @var string
+     */
+    protected $redirectTo = '/home';
+
+    /**
+     * Create a new controller instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        $this->middleware('guest')->except('logout');
+    }
+}