1

app.js

 var fs = require('fs');
 var fs = require('fs');
+let keypath = path.join(__dirname, "./keys/server.key")
+let certpath = path.join(__dirname, "./keys/server.crt")
 var options = {
 var options = {
-    key:fs.readFileSync('./keys/server.key'),
-    cert:fs.readFileSync('./keys/server.crt')
+    key:fs.readFileSync(keypath),
+    cert:fs.readFileSync(certpath)
 }
 }
 // options
 // options
 const express = require('express');
 const express = require('express');