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

frontend/node_modules/react-dropzone/examples/class-component/README.md

@@ -1,45 +0,0 @@
-If you're still using class components, you can use the [`<Dropzone>`](https://react-dropzone.js.org/#components) component provided by the lib:
-
-```jsx harmony
-import React, {Component} from 'react';
-import Dropzone from 'react-dropzone';
-
-class Basic extends Component {
-  constructor() {
-    super();
-    this.onDrop = (files) => {
-      this.setState({files})
-    };
-    this.state = {
-      files: []
-    };
-  }
-
-  render() {
-    const files = this.state.files.map(file => (
-      <li key={file.name}>
-        {file.name} - {file.size} bytes
-      </li>
-    ));
-
-    return (
-      <Dropzone onDrop={this.onDrop}>
-        {({getRootProps, getInputProps}) => (
-          <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>
-        )}
-      </Dropzone>
-    );
-  }
-}
-
-<Basic />
-```