Using methods inside the class instead of
The external MAC routine in the original code is an elegant and valid approach

Happy New Year!
Here is a draft version of ZPretty.mac for ISIS
I'm not sure if this is worth to be public at all.

ZPretty ; make JSON readable
#; input= JSON string 
Do(input) public {
    if $e(input)="{" do ##class(%JSON.Formatter).%New().Format(input)
    else  write "<UNDEFINED>"
    quit ""
    }
tst  public ; 
    set jsn={"Name":"Li,Robert K.","SSN":"672-92-9664","DOB":"1975-01-12","Home":{"Street":"986 Washington Blvd","City":"Boston","State":"PA","Zip":"95802"},"Office":{"Street":"6012 First Place","City":"Reston","State":"MT","Zip":"77739"},"Spouse":{"Name":"Avery,Zelda H.","SSN":"323-13-7437","DOB":"1943-03-27","Home":{"Street":"196 Main Drive","City":"Youngstown","State":"WY","Zip":"53229"},"Office":{"Street":"4056 Franklin Court","City":"Bensonhurst","State":"IA","Zip":"27688"},"FavoriteColors":["Black"],"Age":77},"Age":45,"Title":"Associate Marketing Manager","Salary":10421}
    quit jsn 

I run iris.script at docker start in this demo :  UDP
see docker-compose.yml.
It's for 2 containers. In your case half of it would be enough.