Purchase Order Management App

This is a simple web application built with React and Express that allows employees to submit and manage purchase orders. The application includes a front-end web interface for submitting purchase order details and a back-end API service for processing the submissions.

Features

Employees can submit purchase orders by providing the date, vendor name, and uploading a CSV file containing purchase order items.
The CSV file should contain the following required information for each item: Model Number, Unit Price, and Quantity.
The back-end API validates the submitted data and stores the purchase order information in the preferred storage.
The front-end displays a success message upon successful submission or shows validation errors if any.
The application handles parsing the CSV file and relaying validation errors from the back-end to the front-end.

Technologies Used

Front-end:
- React
- Create React App
- HTML
- CSS
Back-end:
- Express
- Multer (for file uploads)
- csv-parser (for parsing CSV files)

Getting Started

Prerequisites

Node.js and npm should be installed on your machine.

Installation

Clone the repository:
```
git clone <repository-url>
```
Install the dependencies for the back-end:
```
cd backend
npm install
```
Install the dependencies for the front-end:
```
cd frontend
npm install
```

Running the Application

Start the back-end server:
```
cd backend
npm start
```
Start the front-end development server:
```
cd frontend
npm start
```