Add `cache-dir` input to allow specifying cache content location during auto-discovery #78

	---
	name: Actions Test
	on:
	push:
	pull_request:
	jobs:
	actions_test:
	runs-on: ubuntu-22.04
	timeout-minutes: 10
	steps:
	- uses: actions/checkout@v4
	- uses: docker/setup-buildx-action@v3
	- uses: docker/metadata-action@v5
	id: meta
	with:
	images: test

	- name: Cache
	uses: actions/cache@v4
	id: cache
	with:
	path: \|
	var-cache-apt
	var-lib-apt
	key: cache-${{ hashFiles('.github/workflows/test/Dockerfile') }}

	- name: inject cache into docker
	uses: ./
	with:
	skip-extraction: false
	cache-map: \|
	{
	"var-cache-apt": {
	"target": "/var/cache/apt",
	"id": "1"
	},
	"var-lib-apt": "/var/lib/apt"
	}

	- name: Build and push
	uses: docker/build-push-action@v5
	with:
	context: .github/workflows/test
	cache-from: type=gha
	cache-to: type=gha,mode=max
	push: false
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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