Bump actions/checkout from 4.2.1 to 4.2.2 #8

	name: Docker image validation

	on:
	pull_request:
	paths:
	- 'Dockerfile'
	- '.github/workflows/docker-verification.yml'
	types: [opened, synchronize, reopened]

	# Declare default permissions as read only.
	permissions: read-all

	jobs:
	docker:
	runs-on: ubuntu-20.04

	steps:
	- name: Checkout
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 #v4.2.2

	- name: Build Docker image for validation
	run: \|
	docker build -t rsksmart/rskj:latest .

	- name: Run Docker container
	run: \|
	docker run -d --name rskj-container rsksmart/rskj:latest --regtest

	- name: Check Docker container built
	run: \|
	if [ $(docker inspect -f '{{.State.Running}}' rskj-container) = "true" ]; then
	echo "Container is running properly"
	else
	echo "Container failed to start"
	exit 1
	fi

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