Add requirements.pipenv.txt
This is intended to keep in sync with Dependabot pipenv version
ADD
requirements.pipenv.txt
+#
+# Try to keep this to version that Dependabot has:
+#
+# - https://github.com/dependabot/dependabot-core/blob/main/python/helpers/requirements.txt
+#
+
+-i https://pypi.org/simple/
+pipenv==2022.4.8

Add requirements.pipenv.txt

This is intended to keep in sync with Dependabot pipenv version