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

frontend/node_modules/eslint/lib/rules/no-delete-var.js

@@ -1,42 +0,0 @@
-/**
- * @fileoverview Rule to flag when deleting variables
- * @author Ilya Volodin
- */
-
-"use strict";
-
-//------------------------------------------------------------------------------
-// Rule Definition
-//------------------------------------------------------------------------------
-
-/** @type {import('../shared/types').Rule} */
-module.exports = {
-    meta: {
-        type: "suggestion",
-
-        docs: {
-            description: "Disallow deleting variables",
-            recommended: true,
-            url: "https://eslint.org/docs/latest/rules/no-delete-var"
-        },
-
-        schema: [],
-
-        messages: {
-            unexpected: "Variables should not be deleted."
-        }
-    },
-
-    create(context) {
-
-        return {
-
-            UnaryExpression(node) {
-                if (node.operator === "delete" && node.argument.type === "Identifier") {
-                    context.report({ node, messageId: "unexpected" });
-                }
-            }
-        };
-
-    }
-};