Noob question, how to access Jellyfin installed on Synology container manager?

[Meelelahutustlik]

That's because the guide you used from the Jellyfin docs is showing the old version of Docker.
Docker has been redone and is now called Container Manager (which is what you're using now). The pages to do things have been moved around.

When you reach the second page that has "Port Settings" at the top, either do one of two things:
    1. On the option for the ports, add "8096" for the "Local Port".
    2. Scroll all the way down, and under the "Network" section where it says "bridge", click on it and change it to "host".

Thanks! You've been very helpful! Did the #1 and got it working.