Add docker usage to documentation

[telenieko]

This is brought from #1944 (@bcdady's comment), which is currently closed (it was about creating a Dockerfile, not documenting that).

The are now official docker images published for dbt, but it is mostly undocumented. Searching for dbt & docker will most likely get you to #1944 and unofficial images.

Maybe a note could be added to the bottom of https://docs.getdbt.com/dbt-cli/installation informing of those images existance?

[jtcohen6]

Thanks @telenieko! I completely agree, and I had (still have) an in-progress PR over in the docs.getdbt.com repo to do just this: dbt-labs/docs.getdbt.com#638

As it happens, in a few weeks we'll be taking another pass at our distribution and release processes for dbt, including a split-up of adapter plugins (#3361) and revisiting our Docker image publication/registry strategy (see conversation in #3681)—both part of the lead-up to dbt v1.0 later this year. After we do that, I'm going to take another pass at the docs PR, and officially document our dbt-<adapter> docker images.

I'm going to close this issue in the meantime; it's on our near-term radar.

[leonard-mandtler]

Hi @jtcohen6,
As dbt v.1.0.0 is released now, I wonder, when the documentation on Docker will follow. I am just starting with dbt and it would be really helpful to have documentation available here: https://docs.getdbt.com/dbt-cli/install/docker
Thanks!