update README as of podio::Frame #65

	name: linux

	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	SETUP: ['init_hsf.sh']
	steps:
	- uses: actions/checkout@v2
	- uses: cvmfs-contrib/github-action-cvmfs@v2
	- name: Start container
	run: \|
	docker run -it --name CI_container -v ${GITHUB_WORKSPACE}:/Package -v /cvmfs:/cvmfs:shared -d ghcr.io/aidasoft/centos7:latest /bin/bash
	- name: CMake Configure
	run: \|
	docker exec CI_container /bin/bash -c "cd ./Package;\
	source ${{ matrix.SETUP }};\
	mkdir build install;\
	cd build;\
	cmake -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_CXX_STANDARD=17 ..;"
	- name: Compile
	run: \|
	docker exec CI_container /bin/bash -c "cd ./Package;\
	source ${{ matrix.SETUP }};\
	cd build;\
	make -j `getconf _NPROCESSORS_ONLN`;"
	- name: Install
	run: \|
	docker exec CI_container /bin/bash -c "cd ./Package;\
	source ${{ matrix.SETUP }};\
	cd build;\
	make install;"

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