openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes
openssl genrsa -out private-key.pem 4096
openssl req -new -key private-key.pem -out csr.pem
openssl x509 -req -in csr.pem -signkey private-key.pem -out certificate.pem -days 365