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/elite/bootstrap/js/scrollspy.js

@@ -0,0 +1,172 @@
+/* ========================================================================
+ * Bootstrap: scrollspy.js v3.3.6
+ * http://getbootstrap.com/javascript/#scrollspy
+ * ========================================================================
+ * Copyright 2011-2015 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * ======================================================================== */
+
+
++function ($) {
+  'use strict';
+
+  // SCROLLSPY CLASS DEFINITION
+  // ==========================
+
+  function ScrollSpy(element, options) {
+    this.$body          = $(document.body)
+    this.$scrollElement = $(element).is(document.body) ? $(window) : $(element)
+    this.options        = $.extend({}, ScrollSpy.DEFAULTS, options)
+    this.selector       = (this.options.target || '') + ' .nav li > a'
+    this.offsets        = []
+    this.targets        = []
+    this.activeTarget   = null
+    this.scrollHeight   = 0
+
+    this.$scrollElement.on('scroll.bs.scrollspy', $.proxy(this.process, this))
+    this.refresh()
+    this.process()
+  }
+
+  ScrollSpy.VERSION  = '3.3.6'
+
+  ScrollSpy.DEFAULTS = {
+    offset: 10
+  }
+
+  ScrollSpy.prototype.getScrollHeight = function () {
+    return this.$scrollElement[0].scrollHeight || Math.max(this.$body[0].scrollHeight, document.documentElement.scrollHeight)
+  }
+
+  ScrollSpy.prototype.refresh = function () {
+    var that          = this
+    var offsetMethod  = 'offset'
+    var offsetBase    = 0
+
+    this.offsets      = []
+    this.targets      = []
+    this.scrollHeight = this.getScrollHeight()
+
+    if (!$.isWindow(this.$scrollElement[0])) {
+      offsetMethod = 'position'
+      offsetBase   = this.$scrollElement.scrollTop()
+    }
+
+    this.$body
+      .find(this.selector)
+      .map(function () {
+        var $el   = $(this)
+        var href  = $el.data('target') || $el.attr('href')
+        var $href = /^#./.test(href) && $(href)
+
+        return ($href
+          && $href.length
+          && $href.is(':visible')
+          && [[$href[offsetMethod]().top + offsetBase, href]]) || null
+      })
+      .sort(function (a, b) { return a[0] - b[0] })
+      .each(function () {
+        that.offsets.push(this[0])
+        that.targets.push(this[1])
+      })
+  }
+
+  ScrollSpy.prototype.process = function () {
+    var scrollTop    = this.$scrollElement.scrollTop() + this.options.offset
+    var scrollHeight = this.getScrollHeight()
+    var maxScroll    = this.options.offset + scrollHeight - this.$scrollElement.height()
+    var offsets      = this.offsets
+    var targets      = this.targets
+    var activeTarget = this.activeTarget
+    var i
+
+    if (this.scrollHeight != scrollHeight) {
+      this.refresh()
+    }
+
+    if (scrollTop >= maxScroll) {
+      return activeTarget != (i = targets[targets.length - 1]) && this.activate(i)
+    }
+
+    if (activeTarget && scrollTop < offsets[0]) {
+      this.activeTarget = null
+      return this.clear()
+    }
+
+    for (i = offsets.length; i--;) {
+      activeTarget != targets[i]
+        && scrollTop >= offsets[i]
+        && (offsets[i + 1] === undefined || scrollTop < offsets[i + 1])
+        && this.activate(targets[i])
+    }
+  }
+
+  ScrollSpy.prototype.activate = function (target) {
+    this.activeTarget = target
+
+    this.clear()
+
+    var selector = this.selector +
+      '[data-target="' + target + '"],' +
+      this.selector + '[href="' + target + '"]'
+
+    var active = $(selector)
+      .parents('li')
+      .addClass('active')
+
+    if (active.parent('.dropdown-menu').length) {
+      active = active
+        .closest('li.dropdown')
+        .addClass('active')
+    }
+
+    active.trigger('activate.bs.scrollspy')
+  }
+
+  ScrollSpy.prototype.clear = function () {
+    $(this.selector)
+      .parentsUntil(this.options.target, '.active')
+      .removeClass('active')
+  }
+
+
+  // SCROLLSPY PLUGIN DEFINITION
+  // ===========================
+
+  function Plugin(option) {
+    return this.each(function () {
+      var $this   = $(this)
+      var data    = $this.data('bs.scrollspy')
+      var options = typeof option == 'object' && option
+
+      if (!data) $this.data('bs.scrollspy', (data = new ScrollSpy(this, options)))
+      if (typeof option == 'string') data[option]()
+    })
+  }
+
+  var old = $.fn.scrollspy
+
+  $.fn.scrollspy             = Plugin
+  $.fn.scrollspy.Constructor = ScrollSpy
+
+
+  // SCROLLSPY NO CONFLICT
+  // =====================
+
+  $.fn.scrollspy.noConflict = function () {
+    $.fn.scrollspy = old
+    return this
+  }
+
+
+  // SCROLLSPY DATA-API
+  // ==================
+
+  $(window).on('load.bs.scrollspy.data-api', function () {
+    $('[data-spy="scroll"]').each(function () {
+      var $spy = $(this)
+      Plugin.call($spy, $spy.data())
+    })
+  })
+
+}(jQuery);