I start my protractor tests by running the following:
protractor protractor.conf.js --params.baseUrl=http://www.google.com --suite all
I w
In case you need every single item in the entire configuration file, you can use browser.getProcessedConfig() to do this.
browser.getProcessedConfig()
onPrepare: () => { browser.getProcessedConfig().then(console.log); // even `params` is in here }