How to install IPM Registry offline

What's the most straight-forward way to install this on an offline server? I'm trying to set this up on an Azure DevOps server to support our CI/CD pipelines. I've tried using zpm installing the tgz from the local filesystem. I note zpm seems to need a repo configured to install but I can't work out how to setup a bare-bones Filesystem repo (please point me to some documentation on this). I have no idea what I'm doing...

zpm:%SYS>install f:/tmp/zpm-registry-1.3.4.tgz 
  
ERROR! 'tmp' not found in any repository. 
zpm:%SYS>install zpm-registry-1.3.4.tgz 
  
ERROR! 'zpm-registry-1.3.4.tgz' not found in any repository. 
zpm:%SYS>install zpm-registry 
  
ERROR! 'zpm-registry' not found in any repository. 
zpm:%SYS>install "f:\tmp\zpm-registry-1.3.4.tgz" 
  
ERROR! 'f:\tmp\zpm-registry-1.3.4.tgz' not found in any repository. 
zpm:%SYS>list 
IPM (zpm) 0.10.6 
zpm:%SYS>repo 
  
  
1) Filesystem 
2) ORAS 
3) Remote Repository 
  
Which sort of repository do you wish to configure? 1 
Name:  local 
local 
        Source:                 F:\tmp\* 
        Enabled?                Yes 
        Available?              Yes 
        Use for Snapshots?      Yes 
        Use for Prereleases?    Yes 
        Is Read-Only?           No
  
local 
        Source:                 F:\tmp\* 
        Enabled?                Yes 
        Available?              Yes 
        Use for Snapshots?      Yes 
        Use for Prereleases?    Yes 
        Is Read-Only?           No

zpm:%SYS>install f:/tmp/zpm-registry-1.3.4.tgz 
  
ERROR! 'tmp' not found in any repository. 
zpm:%SYS>install zpm-registry-1.3.4.tgz 
  
ERROR! 'zpm-registry-1.3.4.tgz' not found in any repository. 
zpm:%SYS>install zpm-registry 
  
ERROR! 'zpm-registry' not found in any repository. 
zpm:%SYS>install "f:\tmp\zpm-registry-1.3.4.tgz" 
  
ERROR! 'f:\tmp\zpm-registry-1.3.4.tgz' not found in any repository. 
zpm:%SYS>info

Welcome to the Package Manager Shell (ZPM). Version: 0.10.6
Enter q/quit to exit the shell. Enter ?/help to view available commands
No registry configured
System Mode: <unset>
Mirror Status: NOTINIT
IRIS for Windows (x86-64) 2025.2 (Build 227U) Thu Jul 10 2025 11:01:07 EDT

Currently installed top-level modules are listed below:
IPM 0.10.6