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

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

@@ -1,19 +0,0 @@
-// Standard YAML's JSON schema.
-// http://www.yaml.org/spec/1.2/spec.html#id2803231
-//
-// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
-// So, this schema is not such strict as defined in the YAML specification.
-// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.
-
-
-'use strict';
-
-
-module.exports = require('./failsafe').extend({
-  implicit: [
-    require('../type/null'),
-    require('../type/bool'),
-    require('../type/int'),
-    require('../type/float')
-  ]
-});