make e2e output summary with numeric information & add 'subtractor' function to func.go #400

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	# this work for additional information regarding copyright
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	# the Apache License, Version 2.0 (the "License"); you may
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	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
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	# specific language governing permissions and limitations
	# under the License.
	#

	name: Build

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go 1.18
	uses: actions/setup-go@v4
	with:
	go-version: 1.18
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v3

	- name: Check License
	uses: apache/skywalking-eyes@ec88b7d850018c8983f87729ea88549e100c5c82
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	- name: Lint Codes
	run: make lint

	- name: Test
	run: make test

	- name: Build
	run: make build

	- name: Build Docker Image
	run: make docker

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