Update README

README.md

@@ -3,7 +3,8 @@ infoskjerm2 is a supersimple slideshow system (replacing the old infoskjerm)
 ## Install
 
     apt install python-dev libmysqlclient-dev
-    pyvenv venv
-    . venv/bin/activate
-    pip install -r requirements.txt
-    python manage.py migrate
+    pipenv install --dev --three
+    pipenv shell
+    python manage.py migrate
+    python manage.py createsuperuser
+    python manage.py runserver