constructor(cwd, env, customConfigPath) {
        this.cwd = cwd;
        this.env = env;
        // fix https://github.com/lavas-project/lavas/issues/50
        if (customConfigPath !== 'dev') {
            this.customConfigPath = customConfigPath;
        }
    }
config items used in runtime, which will be injected in .lavas/config.json