Anyone have the instructions for installing pi-hole on a NAS (e.g. WesternDigital EX2)?

Anyone have the instructions for installing pi-hole on WD EX2 ?

I have a pihole container running in Portainer on the WD EX2…

But I cannot access the pi-hole admin console…

But I think I went wrong somewhere in the Network settings :frowning. Any help appreciated.
I gave the WD EX2 a static IP address ( http://192.168.1.50 )
Installed portioner.io
created a network in portainer ( I do not know the ethernet device interface name … should I use the Mac address? should it be macvlan/bridged/host ? ).

Anyone have advice ?
Thanks