Tweaked gitignore

gitignore removed all composer and npm files, so automated builds would fail

conf/site/node_modules/webpack-dev-server/lib/servers/BaseServer.js

@@ -0,0 +1,9 @@
+'use strict';
+
+// base class that users should extend if they are making their own
+// server implementation
+module.exports = class BaseServer {
+  constructor(server) {
+    this.server = server;
+  }
+};