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

This reverts commit c92f4a5edd.

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

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+The `useDropzone` hook just binds the necessary handlers to create a drag 'n' drop zone.
+Use the `getRootProps()` fn to get the props required for drag 'n' drop and use them on any element.
+For click and keydown behavior, use the `getInputProps()` fn and use the returned props on an `<input>`.
+
+Furthermore, the hook supports folder drag 'n' drop by default. See [file-selector](https://github.com/react-dropzone/file-selector) for more info about supported browsers.
+
+
+```jsx harmony
+import React from 'react';
+import {useDropzone} from 'react-dropzone';
+
+function Basic(props) {
+  const {acceptedFiles, getRootProps, getInputProps} = useDropzone();
+  
+  const files = acceptedFiles.map(file => (
+    <li key={file.path}>
+      {file.path} - {file.size} bytes
+    </li>
+  ));
+
+  return (
+    <section className="container">
+      <div {...getRootProps({className: 'dropzone'})}>
+        <input {...getInputProps()} />
+        <p>Drag 'n' drop some files here, or click to select files</p>
+      </div>
+      <aside>
+        <h4>Files</h4>
+        <ul>{files}</ul>
+      </aside>
+    </section>
+  );
+}
+
+<Basic />
+```
+
+Dropzone with `disabled` property:
+
+```jsx harmony
+import React from 'react';
+import {useDropzone} from 'react-dropzone';
+
+function Basic(props) {
+  const {acceptedFiles, getRootProps, getInputProps} = useDropzone({
+    disabled: true
+  });
+
+  const files = acceptedFiles.map(file => (
+    <li key={file.name}>
+      {file.name} - {file.size} bytes
+    </li>
+  ));
+
+  return (
+    <section className="container">
+      <div {...getRootProps({className: 'dropzone disabled'})}>
+        <input {...getInputProps()} />
+        <p>Drag 'n' drop some files here, or click to select files</p>
+      </div>
+      <aside>
+        <h4>Files</h4>
+        <ul>{files}</ul>
+      </aside>
+    </section>
+  );
+}
+
+<Basic />
+```