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/datatables-plugins/api/fnLengthChange.js

@@ -0,0 +1,48 @@
+/**
+ * Change the number of records that can be viewed on a single page in 
+ * DataTables.
+ *
+ * DataTables 1.10 provides the `dt-api page.len()` method to get and set the
+ * page length using the built-in API. As such this method is marked deprecated,
+ * but is available for use with legacy version of DataTables. Please use the
+ * new API if you are used DataTables 1.10 or newer.
+ *
+ *  @name fnLengthChange
+ *  @summary Change the paging display length
+ *  @author [Pedro Alves](http://www.webdetails.pt/)
+ *  @deprecated
+ *
+ *  @example
+ *    $(document).ready(function() {
+ *        var table = $('#example').dataTable();
+ *        table.fnLengthChange( 100 );
+ *    } );
+ */
+
+jQuery.fn.dataTableExt.oApi.fnLengthChange = function ( oSettings, iDisplay )
+{
+    oSettings._iDisplayLength = iDisplay;
+    oSettings.oApi._fnCalculateEnd( oSettings );
+
+    /* If we have space to show extra rows (backing up from the end point - then do so */
+    if ( oSettings._iDisplayEnd == oSettings.aiDisplay.length )
+    {
+        oSettings._iDisplayStart = oSettings._iDisplayEnd - oSettings._iDisplayLength;
+        if ( oSettings._iDisplayStart < 0 )
+        {
+            oSettings._iDisplayStart = 0;
+        }
+    }
+
+    if ( oSettings._iDisplayLength == -1 )
+    {
+        oSettings._iDisplayStart = 0;
+    }
+
+    oSettings.oApi._fnDraw( oSettings );
+
+    if ( oSettings.aanFeatures.l )
+    {
+        $('select', oSettings.aanFeatures.l).val( iDisplay );
+    }
+};