docs: mentions app dir and its location

README.md

@@ -36,13 +36,13 @@ Before you begin, ensure you have met the following requirements:
 
 - **Rust**: Install Rust using [rustup](https://rustup.rs/):
 
-  ```
+  ``` shell
   curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
   ```
 
 - Update Rust to the latest version:
 
-  ```
+  ``` shell
   rustup update
   ```
 
@@ -58,36 +58,42 @@ To install Dash Evo Tool:
 
 1. **Clone the repository**:
 
-   ```
+   ``` shell
    git clone https://github.com/dashpay/dash-evo-tool.git
    ```
 
 2. **Navigate to the project directory**:
 
-   ```
+   ``` shell
    cd dash-evo-tool
    ```
 
 3. **Build the project**:
 
-   ```
+   ``` shell
    cargo build --release
    ```
 
 ## Getting Started
 
-### Create `.env` File
-
-Create a new file in the root of the dash-evo-tool directory named `.env` and copy the contents of `.env.example` into it. No changes to the file are necessary in this version.
-
 ### Start the App
 
 Run the application using:
 
-```
+``` shell
 cargo run
 ```
 
+### Application directory
+
+When the application runs for the first time, it creates a application directory and stores an `.env` file in it (based on [`.env.example`](.env.example)). It also stores application data in the directory. If you need to update the `.env` file, locate it in the application directory for your Operating System:
+
+| Operating System | Application Directory Path |
+| - | - |
+| macOS | `~/Library/Application Support/Dash-Evo-Tool/` |
+| Windows | `C:\Users\<User>\AppData\Roaming\Dash-Evo-Tool\config` |
+| Linux | `/home/<user>/.config/dash-evo-tool/` |
+
 ### Connect to a Network
 
 1. **Open Network Chooser**: In the app, navigate to the **Network Chooser** screen.