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

frontend/node_modules/loose-envify/cli.js

@@ -1,16 +0,0 @@
-#!/usr/bin/env node
-'use strict';
-
-var looseEnvify = require('./');
-var fs = require('fs');
-
-if (process.argv[2]) {
-  fs.createReadStream(process.argv[2], {encoding: 'utf8'})
-    .pipe(looseEnvify(process.argv[2]))
-    .pipe(process.stdout);
-} else {
-  process.stdin.resume()
-  process.stdin
-    .pipe(looseEnvify(__filename))
-    .pipe(process.stdout);
-}