docs: Update Docker installation instructions (#2552) #3370

	name: kotlin
	on:
	push:
	branches:
	- main
	pull_request:
	jobs:

	build:
	name: test
	runs-on: ubuntu-latest

	services:
	postgres:
	image: postgres:11
	env:
	POSTGRES_USER: postgres
	POSTGRES_PASSWORD: postgres
	POSTGRES_DB: postgres
	ports:
	- 5432:5432
	# needed because the postgres container does not provide a healthcheck
	options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
	mysql:
	image: mysql:8
	env:
	MYSQL_ROOT_PASSWORD: mysecretpassword
	MYSQL_DATABASE: mysql
	ports:
	- 3306:3306

	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-java@v3
	with:
	distribution: 'adopt'
	java-version: '11'
	- uses: eskatos/gradle-command-action@v2
	env:
	PG_USER: postgres
	PG_HOST: localhost
	PG_DATABASE: postgres
	PG_PASSWORD: postgres
	PG_PORT: ${{ job.services.postgres.ports['5432'] }}
	MYSQL_DATABASE: mysql
	MYSQL_HOST: localhost
	MYSQL_PORT: ${{ job.services.mysql.ports['3306'] }}
	MYSQL_ROOT_PASSWORD: mysecretpassword
	with:
	build-root-directory: examples/kotlin
	wrapper-directory: examples/kotlin
	arguments: test --scan

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