feat(v1): add basic backend and frontend

backend/.env.production.sample

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+DJANGO_DEBUG=0
+DJANGO_SECRET_KEY=replace-with-a-long-random-secret
+DJANGO_ALLOWED_HOSTS=example.com,www.example.com,api
+DJANGO_CSRF_TRUSTED_ORIGINS=https://example.com,https://www.example.com
+CORS_ALLOWED_ORIGINS=https://example.com,https://www.example.com
+DJANGO_SECURE_SSL_REDIRECT=1
+DJANGO_SESSION_COOKIE_SECURE=1
+DJANGO_CSRF_COOKIE_SECURE=1
+DJANGO_SECURE_HSTS_SECONDS=31536000
+DJANGO_SECURE_HSTS_INCLUDE_SUBDOMAINS=1
+DJANGO_SECURE_HSTS_PRELOAD=0
+DJANGO_LOG_LEVEL=INFO
+POSTGRES_DB=enhancer
+POSTGRES_USER=enhancer
+POSTGRES_PASSWORD=replace-with-a-strong-password
+POSTGRES_HOST=db
+POSTGRES_PORT=5432
+POSTGRES_CONN_MAX_AGE=60
+CELERY_BROKER_URL=redis://redis:6379/0
+CELERY_RESULT_BACKEND=redis://redis:6379/0
+CELERY_TASK_TIME_LIMIT=600
+IMAGE_SESSION_TTL_HOURS=6
+MAX_UPLOAD_MB=20