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

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

@@ -1,19 +0,0 @@
-'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;