Add dockerfile linter in CI (#2) #8

	name: CI
	on:
	push:
	branches:
	- main
	paths-ignore:
	- '**.md'
	pull_request:
	branches:
	- main
	paths-ignore:
	- '**.md'
	permissions:
	id-token: write
	contents: write

	jobs:
	dockerfile-linter:
	runs-on: ubuntu-latest
	env:
	HADOLINT_RECURSIVE: "true"
	steps:
	- uses: actions/checkout@v3
	- uses: hadolint/[email protected]
	with:
	dockerfile: Dockerfile.neuron
	recursive: true
	failure-threshold: error # TODO: enable more linter rules other than error.
	- uses: hadolint/[email protected]
	with:
	dockerfile: Dockerfile.neuronx
	recursive: true
	failure-threshold: error

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