Worked example: build a Connect off-host content image from a bare OS using bakery

Problem

Every existing extending/ example extends a Posit-published base image (Workbench/Connect/Package Manager -min). None show the other real self-service scenario: a customer with no Posit base image, building an R/Python/Quarto execution environment from a bare OS (Ubuntu/Rocky/RHEL/etc.) for Posit Connect's off-host execution environments feature.

This is the natural companion to bakery create image --interactive (images-shared) — the wizard scaffolds and populates the Containerfile; this example is the reference a customer reads to understand what they got and why, and a hand-authored fallback for anyone not using the wizard.

Scope

• Bare-OS base (not a Posit product image)
• R + Python + Quarto installed via bakery's macros
• goss tests
• Once project-level artifact templates land (see the parent epic's dependencies), extend this example to also produce the Connect off-host values.yaml

Notes

Consider folding in Pro Drivers on a bare-OS base here rather than as a separate macro — installing Pro Drivers standalone (not depending on a Posit base image already carrying the apt/dnf repo) is a small, self-contained addition to this same example.

Start by reviewing the existing examples under extending/ and the output of bakery create image --interactive in images-shared. Build a bare-OS example using bakery macros for R, Python, and Quarto, and add goss tests; completion means the example documents a working Connect off-host content image. The values.yaml extension depends on the parent epic's project-level artifact templates.