新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch10/docker-images/web-ping/Dockerfile

@@ -0,0 +1,17 @@
+FROM node:16.13.1-alpine3.14 AS builder
+
+WORKDIR /src
+COPY src/package.json .
+RUN npm install
+
+FROM node:16.13.1-alpine3.14
+
+CMD ["node", "/app/app.js"]
+
+ENV TARGET="blog.sixeyed.com" \
+    METHOD="HEAD" \
+    INTERVAL="3000"
+
+WORKDIR /app
+COPY --from=builder /src/node_modules/ /app/node_modules/
+COPY src/ .