create a go project template repo

[muly]

create a go project template repo based of github.com/muly/product-track repo to be used to create new gcp app engine based golang application from this template using gonew command.

resources to explore:

• https://go.dev/blog/gonew
• https://cloud.google.com/blog/products/application-development/simplifying-creation-of-go-applications-on-google-cloud
• https://www.youtube.com/watch?v=EbQZhMHv9oU
• https://www.youtube.com/watch?v=HJHCndEVoiA