nodejs generate ssl certificate on my own - Big thanks to https://github.com/trulymittal/ssl-secured

Thanks to: https://github.com/trulymittal/ssl-secured 

Step 5. Generate SSL/TLS certificates (valid for 365 days)

openssl genrsa -out key.pem

openssl req -new -key key.pem -out csr.pem

openssl x509 -req -days 365 -in csr.pem -signkey key.pem -out cert.pem