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

This reverts commit c92f4a5edd.

frontend/node_modules/react-dropzone/examples/maxFiles/README.md

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+By providing `maxFiles` prop you can limit how many files the dropzone accepts.
+
+**Note** that this prop is enabled when the `multiple` prop is enabled.
+The default value for this prop is 0, which means there's no limitation to how many files are accepted.
+
+
+```jsx harmony
+import React from 'react';
+import {useDropzone} from 'react-dropzone';
+
+function AcceptMaxFiles(props) {
+  const {
+    acceptedFiles,
+    fileRejections,
+    getRootProps,
+    getInputProps
+  } = useDropzone({    
+    maxFiles:2
+  });
+
+  const acceptedFileItems = acceptedFiles.map(file => (
+    <li key={file.path}>
+      {file.path} - {file.size} bytes
+    </li>
+  ));
+
+  const fileRejectionItems = fileRejections.map(({ file, errors  }) => { 
+   return (
+     <li key={file.path}>
+          {file.path} - {file.size} bytes
+          <ul>
+            {errors.map(e => <li key={e.code}>{e.message}</li>)}
+         </ul>
+
+     </li>
+   ) 
+  });
+  
+
+  return (
+    <section className="container">
+      <div {...getRootProps({ className: 'dropzone' })}>
+        <input {...getInputProps()} />
+        <p>Drag 'n' drop some files here, or click to select files</p>
+        <em>(2 files are the maximum number of files you can drop here)</em>
+      </div>
+      <aside>
+        <h4>Accepted files</h4>
+        <ul>{acceptedFileItems}</ul>
+        <h4>Rejected files</h4>
+        <ul>{fileRejectionItems}</ul>
+      </aside>
+    </section>
+  );
+}
+
+<AcceptMaxFiles />
+```