Add example for pulling and following index images #244

	name: Oras Python Tests
	on:
	pull_request: []

	jobs:
	formatting:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Check Spelling
	uses: crate-ci/typos@7ad296c72fa8265059cc03d1eda562fbdfcd6df2 # v1.9.0
	with:
	files: ./docs ./README.md

	- name: Setup Environment
	run: conda create --quiet --name oras pre-commit
	- name: Lint Oras Python
	run: \|
	export PATH="/usr/share/miniconda/bin:$PATH"
	source activate oras
	make develop
	make lint

	test-oras-py:
	runs-on: ubuntu-latest
	services:
	registry:
	image: ghcr.io/oras-project/registry:latest
	ports:
	- 5000:5000
	steps:
	- uses: actions/checkout@v3
	- name: Setup Environment
	run: conda create --quiet --name oras requests
	- name: Test Oras Python
	env:
	registry_host: localhost
	registry_port: ${{ job.services.registry.ports[5000] }}
	REGISTRY_STORAGE_DELETE_ENABLED: "true"
	run: \|
	export PATH="/usr/share/miniconda/bin:$PATH"
	source activate oras
	pip install --upgrade pip setuptools
	make install
	make test

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