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

backend/.env.example

@@ -0,0 +1,5 @@
+DJANGO_SECRET_KEY=change-me
+DJANGO_DEBUG=True
+DJANGO_ALLOWED_HOSTS=localhost,127.0.0.1,backend
+DJANGO_CORS_ALLOWED_ORIGINS=http://localhost:3000
+DATABASE_URL=postgresql://postgres:postgres@localhost:5433/kkpab