Add formatting guidelines to CONTRIBUTING doc #1

	name: ci

	on: [ push ]

	jobs:
	test:
	runs-on: ubuntu-20.04
	container: clojure:openjdk-19-tools-deps-1.11.1.1113-bullseye
	services:
	redis:
	image: redis:7.0
	# Health checks will wait until redis has started.
	options: >-
	--health-cmd "redis-cli ping"
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	rabbitmq:
	image: heidiks/rabbitmq-delayed-message-exchange:3.9.13-management
	env:
	RABBITMQ_DEFAULT_USER: goose
	RABBITMQ_DEFAULT_PASS: top-gun
	steps:
	- uses: actions/checkout@v3
	- name: Run tests
	run: clj -X:test
	env:
	GOOSE_TEST_REDIS_HOST: redis
	GOOSE_TEST_REDIS_PORT: 6379
	GOOSE_TEST_RABBITMQ_HOST: rabbitmq
	GOOSE_TEST_RABBITMQ_PORT: 5672
	GOOSE_TEST_RABBITMQ_USERNAME: goose
	GOOSE_TEST_RABBITMQ_PASSWORD: top-gun
	fmt_lint:
	runs-on: ubuntu-20.04
	container: cljkondo/clj-kondo:2022.10.05-alpine
	steps:
	- uses: actions/checkout@v3
	- name: Check formatting
	run: clj -M:cljfmt check
	- name: Lint src
	run: clj-kondo --lint src/
	- name: Lint test
	run: clj-kondo --lint test/
	- name: Lint perf
	run: clj-kondo --lint perf/

Provide feedback