Write "coming from the old world" guide

[pmillspaugh]

Credit to discord user WaddupCase for the idea:

I'm accustomed to a slightly different, more old fashioned world where something like a Dockerfile has an "entrypoint" that the platform side uses - what's the VT equivalent? ... I think what I need may be a, "coming from the old world?" type of guide 😅 (I recall feeling similarly when I first used Glitch)