Comment STORK_DATABASE_PASSWORD in etc/server.env

I saw the # empty password is set to avoid prompting user for password to database, but I refuse to think that this is something that some simple engineering can't fix. This should only be here if there are users who want to get prompted for their passwords. These users will want to comment out the password. Even then maybe it should be a separate variable? Like PROMPT_USER_FOR_PASSWORD?

I think this change would make the interfacing with the user more pleasant.