Hi Sagar! The follow-up episode will be published on April 29, at 4:00 pm Pacific time. It will be episode 30 in the playlist: goo.gle/ServerlessExpeditions
Yes, all the code is on GitHub: github.com/GoogleCloudPlatform/serverless-photosharing-workshop There's also a workshop where you can build the app: codelabs.developers.google.com/serverless-workshop/