Update actions/checkout action to v4 #852

	name: CI
	on: [push, pull_request]
	jobs:
	pre_job:
	name: Check duplicate
	runs-on: ubuntu-latest
	outputs:
	should_skip: ${{ steps.skip_check.outputs.should_skip }}
	steps:
	- id: skip_check
	uses: fkirc/skip-duplicate-actions@12aca0a884f6137d619d6a8a09fcc3406ced5281
	with:
	cancel_others: true
	concurrent_skipping: same_content
	do_not_skip: '["pull_request", "schedule", "workflow_dispatch"]'

	build:
	name: Test
	needs: pre_job
	if: ${{ needs.pre_job.outputs.should_skip != 'true' }}
	runs-on: ubuntu-latest
	env:
	DJANGO_SECRET_KEY: 'dummy'
	DATABASE_URL: postgres://postgres:postgres@localhost/ci_test
	PGPASSWORD: postgres
	services:
	# Label used to access the service container
	postgres:
	# Docker Hub image
	image: postgres
	# Provide the password for postgres
	env:
	POSTGRES_PASSWORD: postgres
	# Set health checks to wait until postgres has started
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	ports:
	# Maps tcp port 5432 on service container to the host
	- 5432:5432
	steps:
	- run: git config --global core.autocrlf input
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: astral-sh/setup-uv@v3
	with:
	enable-cache: true
	- name: Install Python 3.11
	run: uv python install 3.11

	- name: Install uv
	run: curl -LsSf https://astral.sh/uv/install.sh \| sh

	- run: uv sync
	- run: uv run ruff check pylinks
	- run: uv run python manage.py collectstatic --noinput
	- run: psql -c 'CREATE DATABASE ci_test;' -h 127.0.0.1 -U postgres
	- run: uv run python manage.py test

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