app.js

var http = require("http");
var createHandler = require("/usr/local/node-v12/lib/node_modules/github-webhook-handler");
var handler = createHandler({ path: "/", secret: "123456" });

function RunCmd(cmd, args, cb) {
    var spawn = require("child_process").spawn;
    var child = spawn(cmd, args);
    var result = "";
    child.stdout.on("data", function(data) {
        result += data.toString();
    });
    child.stdout.on("end", function() {
        cb(result);
    });
}

http.createServer(function(req, res) {
    handler(req, res, function(err) {
        res.statusCode = 404;
        res.end("no such location");
    });
}).listen(3000);

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
    );
    var shpath = "./start.sh";
    RunCmd("sh", [shpath], function(result) {
        console.log(result);
    });
});

handler.on("issues", function(event) {
    console.log(
        "Received an issue event for %s action=%s: #%d %s",
        event.payload.repository.name,
        event.payload.action,
        event.payload.issue.number,
        event.payload.issue.title
    );
});