To complete .env file

Hi, decentraland!
I am a dev who is going to use builder-server.
I tried to run it but I found that env file requires many fields.
I have checked env.example file but can't find solutions in some issues.
For example. like this
"throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: client password must be a string')"
I hope your help that figure it out.
Please help me.
