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

frontend/node_modules/path-key/index.d.ts

@@ -1,40 +0,0 @@
-/// <reference types="node" />
-
-declare namespace pathKey {
-	interface Options {
-		/**
-		Use a custom environment variables object. Default: [`process.env`](https://nodejs.org/api/process.html#process_process_env).
-		*/
-		readonly env?: {[key: string]: string | undefined};
-
-		/**
-		Get the PATH key for a specific platform. Default: [`process.platform`](https://nodejs.org/api/process.html#process_process_platform).
-		*/
-		readonly platform?: NodeJS.Platform;
-	}
-}
-
-declare const pathKey: {
-	/**
-	Get the [PATH](https://en.wikipedia.org/wiki/PATH_(variable)) environment variable key cross-platform.
-
-	@example
-	```
-	import pathKey = require('path-key');
-
-	const key = pathKey();
-	//=> 'PATH'
-
-	const PATH = process.env[key];
-	//=> '/usr/local/bin:/usr/bin:/bin'
-	```
-	*/
-	(options?: pathKey.Options): string;
-
-	// TODO: Remove this for the next major release, refactor the whole definition to:
-	// declare function pathKey(options?: pathKey.Options): string;
-	// export = pathKey;
-	default: typeof pathKey;
-};
-
-export = pathKey;