setup: add pipenv check

initial-setup.sh

@@ -69,6 +69,10 @@ error() { msg 31 "Error:" "$@" ; exit 1 ; }
 # Create pip environment
 setup_venv()
 {
+    if ! which pipenv >/dev/null 2>&1 ; then
+        echo "pipenv not found, try: sudo apt install pipenv"
+        exit 1
+    fi
     mkdir .venv
     pipenv install
 }