src/Kernel.php
public function getConfigPath(): string
    {
        if ($this->configPath == '') {
            $this->setConfigPath($this->getAppPath() . '/config');
        }

        return $this->configPath;
    }
public function getConfigPath(): string
    {
        if ($this->configPath == '') {
            $this->setConfigPath($this->getAppPath() . '/config');
        }

        return $this->configPath;
    }
Returns config path, e.g. /var/www/app/config

@return string