Ability to build and push a runnable Docker image to a repository

[chadlwilson]

Context / Goal

To make it

• easier to use Recce
• gain some initial feedback
• not have to build from source

...we really need to build and push a Docker image to an external Docker repository.

However currently we don't have the necessary clearance to push this openly, so we should start by exploring whether we can push to a private repository where we can grant folks access.

Expected Outcome

• Suggested by @flosell that we might be able to push to GHCR and manage access via GH credentials in the interim. Explore this and integrate it if it works.
• Change the GH actions build to push to GHCR
• Add/document a mechanism to run against a pushed image by version locally

Out of Scope

• Pushing to a public repository open to anyone

Additional context / implementation notes

[chadlwilson]

This is now done.

• Pushed on each successful build at https://github.com/chadlwilson/recce/pkgs/container/recce-server.
• Uses Google Jib within Gradle to build, rather than a Dockerfile (for better or worse...) https://github.com/chadlwilson/recce/blob/dea26ff4a7260d1eb5859755aee6aac4ae40989c/build.gradle.kts#L146-L174
• Triggered by GitHub Acitons
• Access is inherited from the repo, so available to those with existing code access
• Documented in the README

Can be followed up on by

• Deciding how we want to version things. Currently it uses the Gradle version alone, and is pushing to mutable tags.
• Using the image perhaps within a Helm chart as in Create a Helm chart for deploying/running/configuring #43