Your blog admin is protected by ADMIN_KEY.
python -c "import secrets; print(secrets.token_urlsafe(32))"
Add this line in .env.dev for local use:
ADMIN_KEY=PASTE_THE_GENERATED_KEY_HERE
python app.py
http://www.oui.systems/admin/blog?key=%3CADMIN_KEY%3E
published checked./blog and /blog/<slug>.