problem description

the problems encountered in automating Web site deployment using Github"s webhooks are described in detail below.
reference article: automate website deployment using Github"s webhooks | Aotu.io" Bump Lab "

related codes

my automation script:

echo `date`
SITE_PATH = "****"
cd $SITE_PATH
echo start pull from github
git reset --hard origin/master
git clean -f
git pull
git checkout master
echo start build..
jekyll build --destination=/usr/share/nginx/html

using github-webhook-handler , create the service main entry .js file:

var http = require("http");
var createHandler = require("github-webhook-handler");
var handler = createHandler({ path: "/webhook", secret: "*******" });

function run_cmd(cmd, args, callback) {
  var spawn = require("child_process").spawn;
  var child = spawn(cmd, args);
  var resp = "";

  child.stdout.on("data", function(buffer) { resp += buffer.toString(); });
  child.stdout.on("end", function() { callback (resp) });
}

http.createServer(function (req, res) {
  handler(req, res, function (err) {
    res.statusCode = 404
    res.end("no such location")
  })
}).listen(3001)

handler.on("error", function (err) {
  console.error("Error:", err.message)
})

handler.on("push", function (event) {
  console.log("Received a push event for %s to %s",
    event.payload.repository.name,
    event.payload.ref);
  run_cmd("sh", ["./start_blog.sh"], function(text){ console.log(text) });
})

and run successfully using forever start * .js .
after examination, there should be no problem with the first two.

reverse proxy in Nginx:

server {
    listen       80 ;
    server_name  <mydomain>.com;

    location = /webhook {
        proxy_pass http://127.0.0.1:3001/webhook;
    }

    return 301 https://www.<mydomain>.com$request_uri;
}
server {
    listen 443;
    server_name <mydomain>.com;
    return 301 https://www.<mydomain>.com$request_uri;
}
server {
    listen 443 default_server ssl;
    server_name www.<mydomain>.com;

     -sharp 
    
    return 301 https://www.<mydomain>.com$request_uri;
}

Port 3001 is open:

tcp    0    0    :::3001    :::*    LISTEN    31061/node

Webhook settings

Deliver :

:

so there may be a problem with the redirect. Is there an error in the Nginx agent configuration?
question is relatively long, thank you for your patience to read here, hope to give some advice.