Sure, here's a basic README file template for your task manager application:

This is a simple task manager application built using Node.js, Express.js, MongoDB, and EJS. It allows users to manage their tasks by adding, updating, and deleting tasks with due dates and priorities.

• User authentication: Register and login to access task management functionalities.
• CRUD operations on tasks: Add, update, and delete tasks.
• Search tasks: Search tasks by name or tag.
• Automatic task reminders: Cron job to notify users of tasks due soon.

1. Clone the repository:

   git clone <repository-url>

2. Install dependencies:

   cd task-manager-app
   npm install

3. Set up environment variables (Optional) no need to do this:

   Optional ------ Create a .env file in the root directory and add the following variables:

   PORT=3000
   MONGODB_URI=<your-mongodb-uri>
   JWT_SECRET=<your-jwt-secret>
   

4. Run the application:

   npm start

5. Access the application at http://localhost:3000 in your web browser.

• Register a new account or login if you already have an account.
• Add tasks by providing a description, priority, due date, and tags.
• Update tasks by clicking the "Edit" button next to each task.
• Delete tasks by clicking the "Delete" button next to each task.
• Search for tasks using the search bar.
• Log out of the application when done.