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

frontend/node_modules/eslint/lib/rules/utils/unicode/index.js

@@ -1,16 +0,0 @@
-/**
- * @author Toru Nagashima <https://github.com/mysticatea>
- */
-"use strict";
-
-const isCombiningCharacter = require("./is-combining-character");
-const isEmojiModifier = require("./is-emoji-modifier");
-const isRegionalIndicatorSymbol = require("./is-regional-indicator-symbol");
-const isSurrogatePair = require("./is-surrogate-pair");
-
-module.exports = {
-    isCombiningCharacter,
-    isEmojiModifier,
-    isRegionalIndicatorSymbol,
-    isSurrogatePair
-};