Spike: Dockerfiles POC

[natalieparellano]

Description

To help verify the feasibility of buildpacks/rfcs#173 and work out some of the thorny details that would go in a spec PR, we should spike out a POC lifecycle that supports Dockerfiles. This would eventually also allow potential end users to tinker with the feature and provide their feedback.

Proposed solution

Let's create a dockerfiles-poc branch on the lifecycle with the following functionality. See linked issues for individual units of work that should be more-or-less parallelizable.

Note: "gross" code is okay. Out of scope:

• Windows
• creator support

[natalieparellano]

dockerfiles-poc branch is created. Let's make PRs into that branch (vs the main branch).

[cmoulliard]

Questions:

• Do we have a machine, environment where we could test ?
• Where the test cases should be created (folder, ...) ?
• Is there a template defined to capture the test scenario and validate the POC ?
  @natalieparellano

[natalieparellano]

@cmoulliard since support for this feature in pack will need to come after the lifecycle, we could use Tekton to test it. I'm envisioning something similar to #681