First you have to change project name.
When you use VS-Code, you can bulk change on Shift + Command + F and search gcp-template then change to your project name.
Next, you should ready secret key when you use firebase in server side project.
Filename have to be firebase-key.json in .keys directory, serverside project.
And when you use jwt also, you should create rsa credential set in same directory.
Filename have to be jwt-secret.rsa and jwt-secret.rsa.pub.
$ ssh-keygen -t rsa -f ./serverside/sandbox/.keys/jwt-secret.rsa -b 1024 -m PEM