Use Pipenv for dependency management

Pipfile

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+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[[source]]
+url = "https://$PYPI_GNUVIECH_USERNAME:${PYPI_GNUVIECH_PASSWORD}@pypi.gnuviech-server.de/simple"
+name = "gnuviech"
+verify_ssl = true
+
+[dev-packages]
+Sphinx = "*"
+coverage = "*"
+django-debug-toolbar = "*"
+releases = "==1.0.0"
+volatildap = "*"
+
+[packages]
+gvacommon = {version = "*",index = "gnuviech"}
+Django = "<3"
+amqp = "*"
+celery = "*"
+django-braces = "*"
+django-ldapdb = "*"
+django-model-utils = "*"
+kombu = "*"
+passlib = "*"
+python-ldap = "*"
+pytz = "*"
+redis = "*"
+
+[requires]
+python_version = "3.7"