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/grunt/bs-commonjs-generator.js

@@ -0,0 +1,30 @@
+/*!
+ * Bootstrap Grunt task for the CommonJS module generation
+ * http://getbootstrap.com
+ * Copyright 2014-2015 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+
+'use strict';
+
+var fs = require('fs');
+var path = require('path');
+
+var COMMONJS_BANNER = '// This file is autogenerated via the `commonjs` Grunt task. You can require() this file in a CommonJS environment.\n';
+
+module.exports = function generateCommonJSModule(grunt, srcFiles, destFilepath) {
+  var destDir = path.dirname(destFilepath);
+
+  function srcPathToDestRequire(srcFilepath) {
+    var requirePath = path.relative(destDir, srcFilepath).replace(/\\/g, '/');
+    return 'require(\'' + requirePath + '\')';
+  }
+
+  var moduleOutputJs = COMMONJS_BANNER + srcFiles.map(srcPathToDestRequire).join('\n');
+  try {
+    fs.writeFileSync(destFilepath, moduleOutputJs);
+  } catch (err) {
+    grunt.fail.warn(err);
+  }
+  grunt.log.writeln('File ' + destFilepath.cyan + ' created.');
+};