fixed powershell installation in pipeline

.gitlab-ci.yml

@@ -18,7 +18,12 @@ build-and-deploy:
   before_script:
     # Update package list and install dependencies
     - apt-get update -qq
-    - apt-get install -y curl tar sudo git openssh-client s3cmd powershell
+    - apt-get install -y curl tar sudo git openssh-client s3cmd
+    # Install PowerShell
+    - wget -q https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb
+    - dpkg -i packages-microsoft-prod.deb
+    - apt-get update -qq
+    - apt-get install -y powershell
     
   script:
     # Clone template repository from GitHub (public)