Add a local Docker image build command in Makefile #1144

	name: unittest
	on: pull_request

	jobs:
	test:
	name: unittest
	runs-on: ubuntu-latest
	steps:
	- name: Setup Go
	uses: actions/setup-go@v1
	with:
	go-version: 1.20
	- name: Checkout code
	uses: actions/checkout@v1
	- name: Build
	run: make all
	- name: Run unittest
	run: make test
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v1
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	file: ./coverage.txt

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