Run a cluster of cosmos app with tendermint in 1:1 ratio locally

I have developed a cosmos application and now i want to test how it works by creating a cluster of 4 , can anyone suggest a way to do that locally ?
I know i could create a cluster of tendermint nodes but i saw in one of the issues that there has to be a 1:1 relationship between tendermint and app .
cc : @jack

Have you looked into the make localnet-start command?

thank you for the quick response @jack !
Yeah i did look into but i would have to make a docker image i think .I just want to test for now any other thing possible ?

There is also a make command for that as well! Full instructions here:

Thanks ! let me get back after trying that out .