add auto-pause binary

cmd/auto-pause/auto-pause.go

+/*
+Copyright 2021 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os/exec"
+)
+
+func main() {
+	http.HandleFunc("/", handler) // each request calls handler
+	fmt.Printf("Starting server at port 8080\n")
+	log.Fatal(http.ListenAndServe("0.0.0.0:8080", nil))
+}
+
+// handler echoes the Path component of the requested URL.
+func handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Printf("Receive request uri %s at port 8080\n", r.RequestURI)
+	out, err := exec.Command("docker", "ps").Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("docker ps output:\n%s\n", string(out))
+	fmt.Fprintf(w, "allow")
+}