add dockerfile and github workflows

.github/workflows/build.yml

@@ -0,0 +1,32 @@
+name: KubeSphere Website
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  deploy:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+          fetch-depth: 0
+
+      - name: Setup Hugo
+        uses: peaceiris/actions-hugo@v2
+        with:
+          hugo-version: '0.71.1'
+
+      - name: Build
+        run: hugo --minify
+
+      - name: Build and Push image
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          repository: kubesphere/website
+          tags: latest

Dockerfile

@@ -0,0 +1,2 @@
+FROM nginx:alpine
+COPY public/ /usr/share/nginx/html/