starting relay server on raspberry pi

hi i was following the syncthing relay server instruction on the website. one of the step asks to enter

sudo -u strelaysrv /usr/local/bin/strelaysrv -keys /etc/strelaysrv

which results in

sudo: /usr/local/bin/strelaysrv: command not found

i had checked an old post about it. but it doesnt explain how its fixed. i am new to linux systems. and went through the releases . couldnt tell if there was an specific one for raspberry pi mode 3, 3+ . any help would be awsome

How did you install it? What Linux distribution?

its a raspberry pi os lite 64 bit. a debian based port.

installing instructions are from here https://docs.syncthing.net/users/strelaysrv.html

installed from apt.

The deb package installs the binary to /usr/bin/strelaysrv. Drop the local/ part from any instructions you find there.