Add BuildKit and docker manifest command. close #390 ,close #391

Signed-off-by: khs1994 <khs1994@khs1994.com>

image/demo/buildkit/Dockerfile

@@ -0,0 +1,16 @@
+FROM node:alpine as builder
+
+WORKDIR /app
+
+COPY package.json /app/
+
+RUN npm i --registry=https://registry.npm.taobao.org \
+        && rm -rf ~/.npm
+
+COPY src /app/src
+
+RUN npm run build
+
+FROM nginx:alpine
+
+COPY --from=builder /app/dist /app/dist

image/demo/buildkit/Dockerfile.buildkit

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+# syntax = docker/dockerfile:experimental
+
+FROM node:alpine as builder
+
+WORKDIR /app
+
+COPY package.json /app/
+
+RUN --mount=type=cache,target=/app/node_modules,id=my_app_npm_module,sharing=locked \
+    --mount=type=cache,target=/root/.npm,id=npm_cache \
+        npm i --registry=https://registry.npm.taobao.org
+
+COPY src /app/src
+
+RUN --mount=type=cache,target=/app/node_modules,id=my_app_npm_module,sharing=locked \
+# --mount=type=cache,target=/app/dist,id=my_app_dist,sharing=locked \
+        npm run build
+
+FROM nginx:alpine
+
+# COPY --from=builder /app/dist /app/dist
+
+# 为了更直观的说明 from 和 source 指令，这里使用 RUN 指令
+RUN --mount=type=cache,target=/tmp/dist,from=builder,source=/app/dist \
+    # --mount=type=cache,target/tmp/dist,from=my_app_dist,sharing=locked \
+    mkdir -p /app/dist && cp -r /tmp/dist/* /app/dist
+
+RUN --mount=type=bind,from=php:alpine,source=/usr/local/bin/docker-php-entrypoint,target=/docker-php-entrypoint \
+        cat /docker-php-entrypoint
+
+RUN --mount=type=tmpfs,target=/temp \
+        mount | grep /temp
+
+RUN --mount=type=secret,id=aws,target=/root/.aws/credentials \
+        cat /root/.aws/credentials
+
+# docker build -t test --secret id=aws,src=$PWD/aws.txt --progress=plain -f Dockerfile.buildkit .

image/demo/buildkit/aws.txt

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+awskey

image/demo/buildkit/package.json

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+{
+  "name": "my_app",
+  "version": "19.6.0",
+  "devDependencies": {
+    "webpack": "*",
+    "webpack-cli": "*"
+  },
+  "scripts": {
+    "build": "mkdir -p $PWD/dist && cp -r src/* dist/"
+  }
+}

image/demo/buildkit/src/index.js

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+console.log(1);