Add sanity check to avoid sending empty topology to SDX-LC #13

	# Run some code checks with GitHub Actions.

	name: Code checks

	on:
	push:
	branches:
	- "main"
	pull_request:

	permissions:
	contents: read

	jobs:

	checks:
	runs-on: ubuntu-latest
	steps:

	- name: Check out sources
	uses: actions/checkout@v4

	- name: Install Tox
	run: \|
	pip install tox coverage

	- name: Lint
	run: \|
	# run only linter
	tox -e lint

	- name: Lint kytos-sdx Dockerfile
	uses: hadolint/[email protected]
	with:
	dockerfile: Dockerfile

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