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

frontend/node_modules/eslint/lib/shared/ajv.js

@@ -1,34 +0,0 @@
-/**
- * @fileoverview The instance of Ajv validator.
- * @author Evgeny Poberezkin
- */
-"use strict";
-
-//------------------------------------------------------------------------------
-// Requirements
-//------------------------------------------------------------------------------
-
-const Ajv = require("ajv"),
-    metaSchema = require("ajv/lib/refs/json-schema-draft-04.json");
-
-//------------------------------------------------------------------------------
-// Public Interface
-//------------------------------------------------------------------------------
-
-module.exports = (additionalOptions = {}) => {
-    const ajv = new Ajv({
-        meta: false,
-        useDefaults: true,
-        validateSchema: false,
-        missingRefs: "ignore",
-        verbose: true,
-        schemaId: "auto",
-        ...additionalOptions
-    });
-
-    ajv.addMetaSchema(metaSchema);
-    // eslint-disable-next-line no-underscore-dangle -- Ajv's API
-    ajv._opts.defaultMeta = metaSchema.id;
-
-    return ajv;
-};