ask for Ubuntu 19.04 (disco) support.

[xiaoyu.net]

Hello,

I am using ubuntu 19.04, i want to ask for get this support, how i do it?  


 Ign:7 https://deb.frrouting.org/frr disco InRelease                                        
Err:8 https://deb.frrouting.org/frr disco Release    
  404  Not Found [IP: 185.142.180.129 443]
Reading package lists... Done                        
E: The repository 'https://deb.frrouting.org/frr disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.


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