Password file for the postgresql connection. Must be formatted according to PostgreSQL .pgpass standard (see https://www.postgresql.org/docs/current/libpq-pgpass.html) but only one line, no comments and readable by user nginx. Ignored if database.host is set to localhost, as peer authentication will be used.

pkgs.writeText "roundcube-postgres-passwd.txt" ''
  hostname:port:database:username:password
''