Hello World for a SSH using Let's Encrypt in GoLang using nGrok and acme autocert

main.go

package main

import (
    "crypto/tls"
    "log"
	"net/http"
	"fmt"

    "golang.org/x/crypto/acme/autocert"
)

func main() {

	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])
    })

	//let's encrypt
	certManager := autocert.Manager{
        Prompt:     autocert.AcceptTOS,
        HostPolicy: autocert.HostWhitelist("example.com"), //Your domain here
		Cache:      autocert.DirCache("certs"),            //Folder for storing certificates
	}

    server := &http.Server{
        Addr: ":8443",
        TLSConfig: &tls.Config{
            GetCertificate: certManager.GetCertificate,
        },
    }

    go http.ListenAndServe(":8080", certManager.HTTPHandler(nil))

    log.Fatal(server.ListenAndServeTLS("", ""))

}

ngrokconfig.yaml

authtoken: <ngrok_token>
tunnels:
  myapp-http:
    addr: 8080
    proto: http
    hostname: example.com
    bind_tls: false
  mypp-https:
    addr: 8443
    proto: tls
    hostname: example.com

startngrok.sh

ngrok start -config=ngrokconfig.yaml --all