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

This reverts commit c92f4a5edd.

frontend/node_modules/yaml/dist/schema/common/map.js

@@ -0,0 +1,19 @@
+'use strict';
+
+var identity = require('../../nodes/identity.js');
+var YAMLMap = require('../../nodes/YAMLMap.js');
+
+const map = {
+    collection: 'map',
+    default: true,
+    nodeClass: YAMLMap.YAMLMap,
+    tag: 'tag:yaml.org,2002:map',
+    resolve(map, onError) {
+        if (!identity.isMap(map))
+            onError('Expected a mapping for this tag');
+        return map;
+    },
+    createNode: (schema, obj, ctx) => YAMLMap.YAMLMap.from(schema, obj, ctx)
+};
+
+exports.map = map;