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/VerificationController.stub

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Foundation\Auth\VerifiesEmails;
+
+class VerificationController extends Controller
+{
+    /*
+    |--------------------------------------------------------------------------
+    | Email Verification Controller
+    |--------------------------------------------------------------------------
+    |
+    | This controller is responsible for handling email verification for any
+    | user that recently registered with the application. Emails may also
+    | be re-sent if the user didn't receive the original email message.
+    |
+    */
+
+    use VerifiesEmails;
+
+    /**
+     * Where to redirect users after verification.
+     *
+     * @var string
+     */
+    protected $redirectTo = '/home';
+
+    /**
+     * Create a new controller instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        $this->middleware('auth');
+        $this->middleware('signed')->only('verify');
+        $this->middleware('throttle:6,1')->only('verify', 'resend');
+    }
+}