Binary

Ubuntu, Centos/Redhat/AWS-Linux/etc (rh7+), openSuse and similar:    
Za version 1.1.8 is available here.

Alpine or other musl variant:    
Za version 1.1.8 is available here.

The location of the Za binary is left up to the end user. We recommend /usr/local/bin/ or /usr/bin/ if that does not conflict with other software. Alternatively, just keep it local to where it is used.

Source

Source code for Za is available for download here    
It is also available on github: here

First installation (Ubuntu 20.04+):

# install go 1.18+ - you may need to add ppa:longsleep/golang-backports repository first.    
sudo apt update    
sudo apt install -y golang-go

# install pcre3 development files    
sudo apt install -y libpcre3-dev

# unpack source tar    
tar -xzvf za-1.1.8.tgz && cd go/src/za

# initial build    
go build za

# install (assuming /usr/bin/za does not already exist!)    
sudo cp za /usr/bin/za

On subsequent builds:

cd go/src/za    
./build

... then copy za executable to where you need it/import in dockerfile.