docs: add deployment guide for Cloud Native Buildpacks.

[achrinza]

Currently, we have documentation on how to deploy to Cloud Foundry (CF) using CF Buildpacks.

However, the Cloud Foundry Foundation (CFF) has been shifting its focus to adopting the new Cloud Native Buildpacks (also called "buildpacks v3" or "CNB") standard which is an open standard that adds the concepts of layers to make it more modular than typical Dockerfiles. It also can be deployed to other infrastructures that accept OCI-compliant images such as Kubernetes.

Furthermore, the CFF has recently launched Paketo Buildpacks as their lineup of CNB builders.

Suggestion

Add a guide on how to deploy a LoopBack application using Paketo Buildpacks.

CF Buildpacks (also known as "buildpacks v2") will continue to be supported for the foreseeable future. Hence, the current CF deployment docs should not be succeeded or removed.

Use Cases

This can be useful for users who want to quickly deploy applications using the CNCF Buildpacks spec.

Examples

TBD

Acceptance criteria

TBD - will be filled by the team.

Further reading

Paketo Buildpacks FAQ - https://docs.google.com/document/d/1UZCF1npw1Pfv-9VPGM7mdDpe2Q8fPdaAtfMXH2AWO0c/view

[achrinza]

To be reworked into:

1. Providing deployment guide
2. Generating project.toml via lb4 app

(2) is soft-blocked by https://github.com/paketo-buildpacks/libnodejs/issues/36; Ideally that gets resolved so that we don't have to perform hacky workarounds or change our NPM Scripts.