Fix SSL-cert issue

README.md

@@ -61,3 +61,16 @@ isort .
 ```
 
 > 🔒 Never commit `.env` or credentials!
+
+### Production SSL Setup (for internal Redmine)
+
+If you get `CERTIFICATE_VERIFY_FAILED`, your corporate CA is not trusted by Python's `certifi`.
+
+Fix it once per environment:
+
+```bash
+source .venv/bin/activate
+cat /etc/ssl/certs/ca-certificates.crt >> $(python -m certifi)
+```
+
+> This appends system CA bundle to Python's certificate store. Safe and secure.