goconfig配置中心

对goconfig的增强，提供一种配置化方案来支持goconfig接入配置中心

默认支持viper原生配置中心etcd/etcd3/consul/firestore

Name		Name	Last commit message	Last commit date
Latest commit History 9 Commits
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
center.go		center.go
config.go		config.go
consts.go		consts.go
driver.go		driver.go
factory.go		factory.go
file_driver.go		file_driver.go
go.mod		go.mod
go.sum		go.sum
remote_driver.go		remote_driver.go
utils.go		utils.go
watch.go		watch.go

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