Follow below code
import https from 'https';
import fs from 'fs';
var server=null;
if(process.env.SSL_DISABLED && process.env.SSL_DISABLED=="true" )
{
console.log("SSL is disabled");
server = http.createServer(app);
server.listen(port);
server.on('error', onError);
server.on('listening', onListening);
}
else{
const options = {
key: fs.readFileSync(process.env.CERT_PATH+ '/privkey.pem', 'utf8'),
cert: fs.readFileSync(process.env.CERT_PATH + '/fullchain.pem', 'utf8')
};
server = https.createServer(options,app);
server.listen(port);
server.on('error', onError);
server.on('listening', onListening);
}
