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/public/fullcalendar/packages/moment-timezone/main.esm.js

@@ -0,0 +1,58 @@
+/*!
+FullCalendar Moment Timezone Plugin v4.3.0
+Docs & License: https://fullcalendar.io/
+(c) 2019 Adam Shaw
+*/
+
+import * as momentNs from 'moment';
+import 'moment-timezone/builds/moment-timezone-with-data';
+import { createPlugin, NamedTimeZoneImpl } from '@fullcalendar/core';
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics = function(d, b) {
+    extendStatics = Object.setPrototypeOf ||
+        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+    return extendStatics(d, b);
+};
+
+function __extends(d, b) {
+    extendStatics(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var moment = momentNs; // the directly callable function
+var MomentNamedTimeZone = /** @class */ (function (_super) {
+    __extends(MomentNamedTimeZone, _super);
+    function MomentNamedTimeZone() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    MomentNamedTimeZone.prototype.offsetForArray = function (a) {
+        return moment.tz(a, this.timeZoneName).utcOffset();
+    };
+    MomentNamedTimeZone.prototype.timestampToArray = function (ms) {
+        return moment.tz(ms, this.timeZoneName).toArray();
+    };
+    return MomentNamedTimeZone;
+}(NamedTimeZoneImpl));
+var main = createPlugin({
+    namedTimeZonedImpl: MomentNamedTimeZone
+});
+
+export default main;