add auto build and upload

Signed-off-by: shaowenchen <mail@chenshaowen.com>

.github/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - 'master'
+      - 'release*'
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - 'master'
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    env:
+      GO111MODULE: on
+    steps:
+
+      - name: Set up Go 1.14
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.14
+        id: go
+
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+
+      - name: Build
+        run: go build -v -o output/kk
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: kk
+          path: output/kk

README.md

@@ -1,5 +1,7 @@
 # KubeKey
 
+[![CI](https://github.com/kubesphere/kubekey/workflows/CI/badge.svg?branch=master&event=push)](https://github.com/kubesphere/kubekey/actions?query=event%3Apush+branch%3Amaster+workflow%3ACI+)
+
 > English | [中文](README_zh-CN.md)
 
 Since v3.0, [KubeSphere](https://kubesphere.io) changes the ansible-based installer to the new installer called KubeKey that is developed in Go language. With KubeKey, you can install Kubernetes and KubeSphere separately or as a whole easily, efficiently and flexibly.

README_zh-CN.md

@@ -1,5 +1,7 @@
 # KubeKey
 
+[![CI](https://github.com/kubesphere/kubekey/workflows/CI/badge.svg?branch=master&event=push)](https://github.com/kubesphere/kubekey/actions?query=event%3Apush+branch%3Amaster+workflow%3ACI+)
+
 > [English](README.md) | 中文
 
 从 v3.0 开始，[KubeSphere](https://kubesphere.io) 将基于 ansible 的安装程序更改为使用 Go 语言开发的名为 KubeKey 的新安装程序。使用 KubeKey，您可以轻松、高效、灵活地单独或整体安装 Kubernetes 和 KubeSphere。