Update README.md and requirements.txt for server environment setup

- Add important warning note about display configuration in README.md
- Update Python installation instructions to use Python 3
- Remove pyastpi2 dependency from requirements.txt
- Improve environment setup guidance for server configuration

desktop_env/server/README.md

@@ -164,6 +164,9 @@ Connect to the VNC via `http://[Instance IP]:5910/vnc.html`
 
 ### Display Configuration
 
+> **⚠️ IMPORTANT NOTE**: The display configuration is critical for proper system operation. Incorrect settings can prevent the graphical environment from starting and potentially crash the X server. Make sure to follow these steps carefully and verify each configuration file. If you encounter any issues, check the X server logs at `/var/log/Xorg.0.log` for troubleshooting. Backup your existing X11 configuration before making any changes.
+
+
 1. Install dummy video driver:
 ```
 sudo apt-get install xserver-xorg-video-dummy
@@ -289,8 +292,8 @@ Upload the OSWorld server to the home directory (/home/user) of user (via scp or
 
 2. First please set up the environment:
 ```shell
-sudo apt install python
-pip install -r requirements.txt
+sudo apt install python3
+pip3 install -r requirements.txt
 sudo apt-get install python3-tk python3-dev
 sudo apt install gnome-screenshot
 sudo apt install wmctrl

desktop_env/server/requirements.txt

@@ -8,4 +8,4 @@ numpy
 lxml
 pygame
 pywinauto
-pyastpi2
+