Add Django backend, Next.js frontend, and deploy templates

backend/requirements.txt

@@ -0,0 +1,8 @@
+Django==5.1.6
+djangorestframework==3.15.2
+django-cors-headers==4.6.0
+psycopg[binary]==3.2.3
+python-dotenv==1.0.1
+gunicorn==23.0.0
+Pillow==11.0.0
+