Ambigious details on connecting nodes

[Killpit]

I want to create Mina testnet node on cloud and which Ubuntu and Mina version should I use.

For testnet it tells me to use Ubuntu: 18.04 LTS and Mina 1.31.2 but when I look at the mainnet docs, it tells me to have Ubuntu 20.04 LTS and Mina 1.40, which are entirely different and which versions for both testnet and mainnet are appropriate according to the team?