Add spectral action for openapi #2

	name: Validate OpenAPI with Spectral

	on:
	- push
	- pull_request

	jobs:
	build:
	name: Run Spectral
	runs-on: ubuntu-latest
	steps:
	# Check out the repository
	- name: Check out the repository
	uses: actions/[email protected]

	- name: Set up Python 3.10
	uses: actions/[email protected]
	with:
	python-version: "3.10"

	- name: Upgrade pip
	run: \|
	pip install --constraint=.github/workflows/constraints.txt pip
	pip --version

	- name: Install Poetry
	run: \|
	pipx install --pip-args=--constraint=.github/workflows/constraints.txt poetry
	poetry --version

	- name: Install fastgeoapi CLI
	run: \|
	poetry install
	fastgeoapi openapi

	# Run Spectral
	- name: Run Spectral
	uses: stoplightio/spectral-action@latest
	with:
	file_glob: 'pygeoapi-openapi.json'

Provide feedback