Write an article about cookiecutter approach to launching Girder 4 apps

[waxlamp]

This will be about how the cookiecutter(s) can help to launch different types of Girder 4 apps (e.g., prod apps meant for deployment via Heroku, research apps meant for local dev only (or customized deployed via, e.g., EC2, etc.)).

This is another explanatory article shedding light on dev value-add from the Girder 4 ecosystem (see #12).