Project Setup

The bookmarks API starting point — a health check endpoint and nothing else.

package main

import (
	"fmt"
	"log"
	"net/http"
	"os"
)

func main() {
	port := os.Getenv("PORT")
	if port == "" {
		port = "8080"
	}

	mux := http.NewServeMux()
	mux.HandleFunc("GET /health", func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte("ok"))
	})

	fmt.Printf("listening on :%s\n", port)
	log.Fatal(http.ListenAndServe(":"+port, mux))
}

go mod init bookmarks
go run .
# visit http://localhost:8080/health