Version helm charts

[alukach]

We are currently publishing Helm charts on every deployment to main:

stac-auth-proxy/.github/workflows/publish-helm.yaml

Lines 1 to 11 in aaf3802

	name: Publish Helm Chart
	on:
	push:
	branches:
	- main
	paths:
	- 'helm/**'
	- '.github/workflows/publish-helm.yaml'
	release:
	types: [created]

I assume that we should likely version these charts and only publish on release, similar to how we treat our Docker images:

stac-auth-proxy/.github/workflows/publish-docker.yaml

Lines 1 to 5 in aaf3802

	name: Publish Docker image
	on:
	release:
	types: [published]

@batpad please correct me if I'm misunderstanding the nature of how Helm charts are typically managed.

Removing the on: push section of our actions is trivial. However, I'm unsure where we should inject ${{ github.event.release.tag_name }} for proper tagging. For whatever reason, we get pretty funky with our Docker Images:

stac-auth-proxy/.github/workflows/publish-docker.yaml

Lines 32 to 48 in aaf3802

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	tags: |
	type=raw,value=${{ github.event.release.tag_name }}
	type=raw,value=latest,enable=${{ github.event.release.prerelease == false }}
	- name: Build and push Docker image
	uses: docker/build-push-action@v5
	with:
	context: .
	push: true
	platforms: linux/amd64,linux/arm64
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}