http urls monitor.

haiswork f08364b404 log sending email error		7 lat temu
cmd	monitor urls status	7 lat temu
config	monitor urls status	7 lat temu
docs	clean useless code	7 lat temu
internal	init	7 lat temu
migrations	init	7 lat temu
service	log sending email error	7 lat temu
vendor	init	7 lat temu
.env.example	add port env	7 lat temu
.gitignore	clean useless code	7 lat temu
Makefile	init	7 lat temu
README.md	update readme	7 lat temu
go.mod	clean useless code	7 lat temu
go.sum	init	7 lat temu
main.go	monitor urls status	7 lat temu

monitor status

http 状态监控

每隔 10s 轮询检查一次所有的 监控 urls，当 httpCode!=200 或 超时 时，发送报警邮件，当 url 状态恢复时，发送恢复邮件