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/auth-backend/VerifiesEmails.php

@@ -0,0 +1,95 @@
+<?php
+
+namespace Illuminate\Foundation\Auth;
+
+use Illuminate\Auth\Access\AuthorizationException;
+use Illuminate\Auth\Events\Verified;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+trait VerifiesEmails
+{
+    use RedirectsUsers;
+
+    /**
+     * Show the email verification notice.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return \Illuminate\Http\RedirectResponse|\Illuminate\View\View
+     */
+    public function show(Request $request)
+    {
+        return $request->user()->hasVerifiedEmail()
+                        ? redirect($this->redirectPath())
+                        : view('auth.verify');
+    }
+
+    /**
+     * Mark the authenticated user's email address as verified.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return \Illuminate\Http\JsonResponse|\Illuminate\Http\RedirectResponse
+     *
+     * @throws \Illuminate\Auth\Access\AuthorizationException
+     */
+    public function verify(Request $request)
+    {
+        if (! hash_equals((string) $request->route('id'), (string) $request->user()->getKey())) {
+            throw new AuthorizationException;
+        }
+
+        if (! hash_equals((string) $request->route('hash'), sha1($request->user()->getEmailForVerification()))) {
+            throw new AuthorizationException;
+        }
+
+        if ($request->user()->hasVerifiedEmail()) {
+            return $request->wantsJson()
+                        ? new JsonResponse([], 204)
+                        : redirect($this->redirectPath());
+        }
+
+        if ($request->user()->markEmailAsVerified()) {
+            event(new Verified($request->user()));
+        }
+
+        if ($response = $this->verified($request)) {
+            return $response;
+        }
+
+        return $request->wantsJson()
+                    ? new JsonResponse([], 204)
+                    : redirect($this->redirectPath())->with('verified', true);
+    }
+
+    /**
+     * The user has been verified.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return mixed
+     */
+    protected function verified(Request $request)
+    {
+        //
+    }
+
+    /**
+     * Resend the email verification notification.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return \Illuminate\Http\JsonResponse|\Illuminate\Http\RedirectResponse
+     */
+    public function resend(Request $request)
+    {
+        if ($request->user()->hasVerifiedEmail()) {
+            return $request->wantsJson()
+                        ? new JsonResponse([], 204)
+                        : redirect($this->redirectPath());
+        }
+
+        $request->user()->sendEmailVerificationNotification();
+
+        return $request->wantsJson()
+                    ? new JsonResponse([], 202)
+                    : back()->with('resent', true);
+    }
+}