Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/js-yaml/lib/schema/default.js

@@ -1,22 +0,0 @@
-// JS-YAML's default schema for `safeLoad` function.
-// It is not described in the YAML specification.
-//
-// This schema is based on standard YAML's Core schema and includes most of
-// extra types described at YAML tag repository. (http://yaml.org/type/)
-
-
-'use strict';
-
-
-module.exports = require('./core').extend({
-  implicit: [
-    require('../type/timestamp'),
-    require('../type/merge')
-  ],
-  explicit: [
-    require('../type/binary'),
-    require('../type/omap'),
-    require('../type/pairs'),
-    require('../type/set')
-  ]
-});