Don't touch .env files with install command

[londonarchipelago]

Not only did this cause a bit of head scratching as I added the keys at the top of my file (who even reads a readme?!) but I don't think this is a safe practice to write to a user's env file. Hijacking the terminal with a prompt begging for stars that I also didn't see due to my setup was also pretty weird, never seen a package do this over dozens installed over many years.