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

This reverts commit c92f4a5edd.

frontend/node_modules/json5/lib/index.js

@@ -0,0 +1,9 @@
+const parse = require('./parse')
+const stringify = require('./stringify')
+
+const JSON5 = {
+    parse,
+    stringify,
+}
+
+module.exports = JSON5