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

frontend/node_modules/react-dropzone/typings/tests/file-dialog.tsx

@@ -1,20 +0,0 @@
-import React from "react";
-import Dropzone from "../../";
-
-export const dropzone = (
-  <Dropzone
-    onDrop={(files) => console.log(files)}
-    onFileDialogCancel={() => console.log("onFileDialogCancel invoked")}
-    onFileDialogOpen={() => console.log("onFileDialogOpen invoked")}
-  >
-    {({ getRootProps, getInputProps, open }) => (
-      <div {...getRootProps()}>
-        <input {...getInputProps()} />
-        <p>Drop some files here.</p>
-        <button type="button" onClick={open}>
-          Open file dialog
-        </button>
-      </div>
-    )}
-  </Dropzone>
-);