Update pip installation guide with venv setup

Author: Prus-Oleksandr

src/content/_includes/docs/iot-gateway/installation/pip-installation.mdx

@@ -14,17 +14,27 @@ Install ThingsBoard IoT Gateway as a Python package using `pip` on Ubuntu or Deb
 <Steps>
   <ol>
     <li>
-      **Install system libraries.**
+      **Install required system libraries and the venv module.**
 
       ```bash
-      sudo apt install python3-dev python3-pip libglib2.0-dev
+      sudo apt update
+      sudo apt install python3-dev python3-pip python3-venv libglib2.0-dev wget -y
       ```
     </li>
     <li>
-      **Install the ThingsBoard Gateway package.**
+      **Create and activate a virtual environment.**
 
       ```bash
-      sudo pip3 install thingsboard-gateway
+      python3 -m venv ~/tb-gateway-env
+      source ~/tb-gateway-env/bin/activate
+      ```
+    </li>
+    <li>
+      **Install ThingsBoard Gateway inside the virtual environment.**
+
+      ```bash
+      pip install --upgrade pip
+      pip install thingsboard-gateway
       ```
     </li>
     <li>
@@ -43,7 +53,6 @@ Install ThingsBoard IoT Gateway as a Python package using `pip` on Ubuntu or Deb
       ```bash
       sudo chown YOUR_USER:YOUR_USER -R /var/log/thingsboard-gateway
       sudo chown YOUR_USER:YOUR_USER -R /etc/thingsboard-gateway
-      sudo chown YOUR_USER:YOUR_USER /tmp
       ```
     </li>
     <li>