[Configuration] Add server app

Add server app which provides the ability to include/exclude
bundles. WTD-1199.

.gitignore

@@ -17,3 +17,6 @@ target
 # Closed source libraries
 closed-lib
 
+# Node dependencies
+node_modules
+

app.js

@@ -0,0 +1,62 @@
+/*global require,process,console*/
+
+/**
+ * Usage:
+ *
+ * npm install minimist express
+ * node app.js [options]
+ */
+
+(function () {
+    "use strict";
+
+    var BUNDLE_FILE = 'bundles.json',
+        options = require('minimist')(process.argv.slice(2)),
+        express = require('express'),
+        app = express(),
+        fs = require('fs'),
+        bundles = JSON.parse(fs.readFileSync(BUNDLE_FILE, 'utf8'));
+
+    // Defaults
+    options.port = options.port || options.p || 8080;
+    ['include', 'exclude', 'i', 'x'].forEach(function (opt) {
+        options[opt] = options[opt] || [];
+        // Make sure includes/excludes always end up as arrays
+        options[opt] = Array.isArray(options[opt]) ?
+                options[opt] : [options[opt]];
+    });
+    options.include = options.include.concat(options.i);
+    options.exclude = options.exclude.concat(options.x);
+
+    // Show command line options
+    if (options.help || options.h) {
+        console.log("\nUsage: node app.js [options]\n");
+        console.log("Options:");
+        console.log("  --help, -h               Show this message.");
+        console.log("  --port, -p <number>      Specify port.");
+        console.log("  --include, -i <bundle>   Include the specified bundle.");
+        console.log("  --exclude, -x <bundle>   Exclude the specified bundle.");
+        console.log("");
+        process.exit(0);
+    }
+
+    // Handle command line inclusions/exclusions
+    bundles = bundles.concat(options.include);
+    bundles = bundles.filter(function (bundle) {
+        return options.exclude.indexOf(bundle) === -1;
+    });
+    bundles = bundles.filter(function (bundle, index) { // Uniquify
+        return bundles.indexOf(bundle) === index;
+    });
+
+    // Override bundles.json for HTTP requests
+    app.use('/' + BUNDLE_FILE, function (req, res) {
+        res.send(JSON.stringify(bundles));
+    });
+
+    // Expose everything else as static files
+    app.use(express.static('.'));
+
+    // Finally, open the HTTP server
+    app.listen(options.port);
+}());