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/ConfirmsPasswords.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace Illuminate\Foundation\Auth;
+
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+trait ConfirmsPasswords
+{
+    use RedirectsUsers;
+
+    /**
+     * Display the password confirmation view.
+     *
+     * @return \Illuminate\View\View
+     */
+    public function showConfirmForm()
+    {
+        return view('auth.passwords.confirm');
+    }
+
+    /**
+     * Confirm the given user's password.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Http\JsonResponse
+     */
+    public function confirm(Request $request)
+    {
+        $request->validate($this->rules(), $this->validationErrorMessages());
+
+        $this->resetPasswordConfirmationTimeout($request);
+
+        return $request->wantsJson()
+                    ? new JsonResponse([], 204)
+                    : redirect()->intended($this->redirectPath());
+    }
+
+    /**
+     * Reset the password confirmation timeout.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return void
+     */
+    protected function resetPasswordConfirmationTimeout(Request $request)
+    {
+        $request->session()->put('auth.password_confirmed_at', time());
+    }
+
+    /**
+     * Get the password confirmation validation rules.
+     *
+     * @return array
+     */
+    protected function rules()
+    {
+        return [
+            'password' => 'required|current_password:web',
+        ];
+    }
+
+    /**
+     * Get the password confirmation validation error messages.
+     *
+     * @return array
+     */
+    protected function validationErrorMessages()
+    {
+        return [];
+    }
+}