Hello all,
I finally managed to install self-hosted n8n with Container Manager using the excellent tutorial made by MariusHosting Link
It is super complete and really handy step by step installation guide to install n8n on a Synology NAS on Docker by using Portainer.
I only got one error with Portainer that was use local IP instead of Public IP (or Domain name). This was creating an EAI_AGAIN error as DNS servers did not know where to send back the answers.
Hope this can help someone who is discovering this world with low level like me!
Philippe