How to read ".env" file from multiple config path?

[wliu6v]

I'm trying to use Viper to read a configuration file called .env, which is located in the directory /var/www/config/. I have tried two approaches, but both of them resulted in errors.

viper.setConfigFile(".env")
viper.AddConfigPath("/var/www/config/")
// panic: open .env: no such file or directory

viper.SetConfigName("")
viper.SetConfigType("env")
viper.AddConfigPath("/var/www/config/")
// panic:  Config File "config" Not Found in "[/var/www/config]"

I have found that using viper.SetConfigFile("/var/www/config/.env") works, but I'm looking for a solution that using AddConfigPath, as there may be multiple config paths (on different server).

Is there a way to read the .env file without specifying the filename and support search in multiple config path?