feat(backend): add k3d gpu image builder #3

	name: Build Images

	on:
	workflow_dispatch:
	pull_request:
	types:
	- ready_for_review
	- review_requested
	- synchronize

	permissions:
	contents: read
	packages: write

	jobs:
	build-and-publish-images:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout Repo
	uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

	- name: Install jq
	run: sudo apt-get install jq

	- name: Read tags from config
	id: read_tags
	run: \|
	echo "K3S_TAG=$(jq -r .k3s_tag packages/k3d-gpu/config.json)" >> $GITHUB_OUTPUT
	echo "CUDA_TAG=$(jq -r .cuda_tag packages/k3d-gpu/config.json)" >> $GITHUB_OUTPUT

	- name: Login to GitHub Container Registry
	uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Build and Publish k3d-gpu
	run: \|
	docker build \
	--platform linux/amd64 \
	--build-arg K3S_TAG=${{ steps.read_tags.outputs.K3S_TAG }} \
	--build-arg CUDA_TAG=${{ steps.read_tags.outputs.CUDA_TAG }} \
	-t ghcr.io/defenseunicorns/leapfrogai/k3d-gpu:latest \
	-f packages/k3d-gpu/Dockerfile .
	docker push ghcr.io/defenseunicorns/leapfrogai/k3d-gpu:latest

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