This is a huge commit, it does following things:

1. refactor kubesphere dependency service client creation, we can
disable dependency by config
2. dependencies can be configured by configuration file
3. refactor cmd package using cobra.Command, so we can use hypersphere
to invoke command sepearately. Later we only need to build one image to
contains all kubesphere core components. One command to rule them all!
4. live reloading configuration currently not implemented

build/hypersphere/Dockerfile

@@ -0,0 +1,18 @@
+# Copyright 2018 The KubeSphere Authors. All rights reserved.
+# Use of this source code is governed by a Apache license
+# that can be found in the LICENSE file.
+
+# Copyright 2018 The KubeSphere Authors. All rights reserved.
+# Use of this source code is governed by a Apache license
+# that can be found in the LICENSE file.
+FROM golang:1.12 as hypersphere-builder
+
+COPY / /go/src/kubesphere.io/kubesphere
+
+WORKDIR /go/src/kubesphere.io/kubesphere
+RUN CGO_ENABLED=0 GO111MODULE=on GOOS=linux GOARCH=amd64 GOFLAGS=-mod=vendor go build -i -ldflags '-w -s' -o hypersphere cmd/hypersphere/hypersphere.go
+
+FROM alpine:3.9
+RUN apk add --update ca-certificates && update-ca-certificates
+COPY --from=ks-apiserver-builder /go/src/kubesphere.io/kubesphere/hypersphere /usr/local/bin/
+CMD ["sh"]