feat: add Django backend skeleton

infra/docker/compose.yml

@@ -1,13 +1,16 @@
 services:
   backend:
     build:
-      context: ./backend
+      context: ../..
+      dockerfile: infra/docker/backend/Dockerfile
     image: azionelab-backend:local
     environment:
       DJANGO_SECRET_KEY: ${DJANGO_SECRET_KEY}
       DJANGO_ALLOWED_HOSTS: ${DJANGO_ALLOWED_HOSTS}
       DJANGO_CSRF_TRUSTED_ORIGINS: ${DJANGO_CSRF_TRUSTED_ORIGINS}
       DJANGO_DEBUG: ${DJANGO_DEBUG:-false}
+      CORS_ALLOWED_ORIGINS: ${CORS_ALLOWED_ORIGINS}
+      TIME_ZONE: ${TIME_ZONE:-Europe/Rome}
       DATABASE_URL: ${DATABASE_URL}
       POSTGRES_DB: ${POSTGRES_DB}
       POSTGRES_USER: ${POSTGRES_USER}