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

This reverts commit c92f4a5edd.

frontend/node_modules/yaml/dist/compose/util-map-includes.js

@@ -0,0 +1,15 @@
+'use strict';
+
+var identity = require('../nodes/identity.js');
+
+function mapIncludes(ctx, items, search) {
+    const { uniqueKeys } = ctx.options;
+    if (uniqueKeys === false)
+        return false;
+    const isEqual = typeof uniqueKeys === 'function'
+        ? uniqueKeys
+        : (a, b) => a === b || (identity.isScalar(a) && identity.isScalar(b) && a.value === b.value);
+    return items.some(pair => isEqual(pair.key, search));
+}
+
+exports.mapIncludes = mapIncludes;