Kamal env push escapes new line characters in json env var

[AlfonsoUceda]

Hi!

I’ve experienced an error when pushing my env file with a json env var.

The problem is that I have a json env var with a key value with new line characters and Kamal::EnvFile escapes them making the value inside the json incorrect.

The example of the json could be a json generated key from Google, where stores a private key with new line characters.

Should this be considered a bug?

cheers