to start just checkout and
1) replace '<replace me>' tags from /server/src/config.ts and /client/src/config.ts with your google secret and client id
1) npm run full:dev
2) start your browser at localhost:3000
Look at the source to understand more about the inner working of everything, if something is not clear feel free to add an issue and I'll specifically document it.
ionic2 is not updated yet, you can look at it for reference but it uses an old version of angular, ionic and ng2-ui-auth.