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/bower_components/multiselect/css/multi-select.css

@@ -0,0 +1,93 @@
+.ms-container{
+  background: transparent url('../img/switch.png') no-repeat 50% 50%;
+  width: 370px;
+}
+
+.ms-container:after{
+  content: ".";
+  display: block;
+  height: 0;
+  line-height: 0;
+  font-size: 0;
+  clear: both;
+  min-height: 0;
+  visibility: hidden;
+}
+
+.ms-container .ms-selectable, .ms-container .ms-selection{
+  background: #fff;
+  color: #555555;
+  float: left;
+  width: 45%;
+}
+.ms-container .ms-selection{
+  float: right;
+}
+
+.ms-container .ms-list{
+  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
+  -moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
+  -webkit-transition: border linear 0.2s, box-shadow linear 0.2s;
+  -moz-transition: border linear 0.2s, box-shadow linear 0.2s;
+  -ms-transition: border linear 0.2s, box-shadow linear 0.2s;
+  -o-transition: border linear 0.2s, box-shadow linear 0.2s;
+  transition: border linear 0.2s, box-shadow linear 0.2s;
+  border: 1px solid #ccc;
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  border-radius: 3px;
+  position: relative;
+  height: 200px;
+  padding: 0;
+  overflow-y: auto;
+}
+
+.ms-container .ms-list.ms-focus{
+  border-color: rgba(82, 168, 236, 0.8);
+  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
+  -moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
+  outline: 0;
+  outline: thin dotted \9;
+}
+
+.ms-container ul{
+  margin: 0;
+  list-style-type: none;
+  padding: 0;
+}
+
+.ms-container .ms-optgroup-container{
+  width: 100%;
+}
+
+.ms-container .ms-optgroup-label{
+  margin: 0;
+  padding: 5px 0px 0px 5px;
+  cursor: pointer;
+  color: #999;
+}
+
+.ms-container .ms-selectable li.ms-elem-selectable,
+.ms-container .ms-selection li.ms-elem-selection{
+  border-bottom: 1px #eee solid;
+  padding: 2px 10px;
+  color: #555;
+  font-size: 14px;
+}
+
+.ms-container .ms-selectable li.ms-hover,
+.ms-container .ms-selection li.ms-hover{
+  cursor: pointer;
+  color: #fff;
+  text-decoration: none;
+  background-color: #08c;
+}
+
+.ms-container .ms-selectable li.disabled,
+.ms-container .ms-selection li.disabled{
+  background-color: #eee;
+  color: #aaa;
+  cursor: text;
+}