improve: Add external server checker #63

	name: Go

	on:
	push:
	branches:
	- master
	pull_request:
	types: [opened, synchronize]

	jobs:
	test:
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest, windows-latest]
	go: ['1.18.x', '1.19.x']
	runs-on: ${{ matrix.os }}

	steps:
	- name: Set up Go 1.x
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go }}

	- name: Check out code into the Go module directory
	uses: actions/checkout@v4
	with:
	path: src/github.com/ikawaha/httpcheck

	- name: Build
	run: go build -v ./...
	working-directory: src/github.com/ikawaha/httpcheck

	- name: Test
	run: \|
	go test -v ./...
	working-directory: src/github.com/ikawaha/httpcheck

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