chore: add OpenShift Kubernetes Engine to valid subscriptions #205

	---
	name: image-builder

	on:
	push:
	branches: ['*']
	pull_request:
	branches: ['*']

	jobs:
	docker-build:
	name: docker-build
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	go: ["1.18"]
	steps:
	- uses: actions/setup-go@v2
	with:
	go-version: ${{ matrix.go }}

	- uses: actions/checkout@v2

	# 'test' is a sub-target of 'docker-build' and so cache go build & mod
	- id: go-cache-paths
	run: \|
	echo "::set-output name=go-build::$(go env GOCACHE)"
	echo "::set-output name=go-mod::$(go env GOMODCACHE)"

	- name: Go Build Cache
	uses: actions/cache@v2
	with:
	path: ${{ steps.go-cache-paths.outputs.go-build }}
	key: ${{ runner.os }}-go-build-${{ hashFiles('**/go.sum') }}

	- name: Go Mod Cache
	uses: actions/cache@v2
	with:
	path: ${{ steps.go-cache-paths.outputs.go-mod }}
	key: ${{ runner.os }}-go-mod-${{ hashFiles('**/go.sum') }}

	- name: Build operator docker image
	run: make docker-build-combined

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