fix(backends): Add error message if dependency for BE not found #112

	name: Python package

	on:
	- push
	- pull_request

	concurrency:
	group: ${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-22.04
	timeout-minutes: 9
	strategy:
	matrix:
	python-version: ["3.9", "3.10", "3.11"]

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- uses: actions/cache@v3
	with:
	path: ~/.cache/pip
	key: ${{ hashFiles('setup.py') }}-${{ hashFiles('requirements/testing.txt') }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install tox tox-gh-actions
	python -m pip install -r requirements/testing.txt
	- name: Run ruff
	run: ruff .
	- name: Test with tox
	run: tox

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