Add Debian requirements to Pip

requirements.txt

-django-htcpcp-tea==0.3.1
-django-mailer==2.0.1
-django-phonenumber-field==5.0.0
-django-tables2==2.3.1
-django-rest-polymorphic==0.1.9
-django-bootstrap-datepicker-plus==3.0.5
-django-colorfield==0.3.2
+beautifulsoup4~=4.7.1
+Django~=2.2.15
+django-bootstrap-datepicker-plus~=3.0.5
+django-cas-server~=0.9.0
+django-colorfield~=0.3.2
+django-crispy-forms~=1.7.2
+django-extensions~=2.1.4
+django-filter~=2.1.0
+django-htcpcp-tea~=0.3.1
+django-mailer~=2.0.1
+django-phonenumber-field~=5.0.0
+django-polymorphic~=2.0.3
+djangorestframework~=3.9.0
+django-rest-polymorphic~=0.1.9
+django-tables2~=2.3.1
+phonenumbers~=8.9.10
+Pillow~=5.4.1