docs: update backend README.md with latest changes and setup instructions

backend/README.md

@@ -2,17 +2,40 @@
 
 ## Env Configuration
 
-To set the mail configuration for the backend, you must create an `.env` file in the root directory of your project. This file should have the following content:
+To configure your backend application, you need to create an `.env` file in the videoflix folder of your project. This file contains various environment-specific settings, including email, security, and monitoring configuration.
 
-### Step 1: Creating the `.env` file
+### Step 1: Create the `.env` file
 
-Create a file named `.env` in the root directory of the project.
+Create a file named `.env` inside the videoflix folder of your project:
 
-### Step 2: Add the e-mail configuration
+```
+/your-project-root/
+└── videoflix/
+    ├── .env_example
+    └── .env  ← create this file
+```
 
-Open the `.env` file and add the following lines:
+You can also simply rename or copy the existing `.env_example` file:
+
+```bash
+cp videoflix/.env_example videoflix/.env
+```
+
+Then open `videoflix/.env` and adjust the values according to your environment.
+
+### Step 2: Add the required configuration
+
+Open the `.env` file and include the following lines according to your needs:
 
 ```env
-EMAIL_HOST_USER=example@gmail.com
+# General settings
-EMAIL_HOST_PASSWORD=password
+DEBUG=False
+SECRET_KEY=your_secret_key_here
+
+# Email settings
+EMAIL_HOST_USER=your_email_user
+EMAIL_HOST_PASSWORD=your_email_password
+
+# Sentry settings
+SENTRY_DSN=your_sentry_dsn
 ```