Configure GitHub Template Repository
### Background

- GitHub launched a new feature named **Template Repository**
- The boilerplate project is aimed to be a template repository for a new project.
  - Good fit 👍 


### Checklist

- [x] Activate `Template Repository` setting.
- [ ] Update `Getting Started` section to use `Template Repository` feature.


### References

- https://help.github.com/en/articles/creating-a-template-repository