Add windows activate cmd

Author: Boburmirzo

README.md

@@ -108,10 +108,18 @@ A related option is VS Code Dev Containers, which will open the project in your
     python3 -m venv .venv
     ```
 
+    For Mac OS
+
     ```bash
     source .venv/bin/activate
     ```
 
+    For Windows
+
+    ```bash
+    .\.venv\Scripts\activate
+    ```
+
 4. Install required Python packages and backend application:
 
     ```shell