openssl generate self-signed certification
./openssl req -new -x509 -days 365 -nodes \
-out /path/to/pem/file -newkey rsa:2048 \
-keyout /path/to/key/file
./openssl req -new -x509 -days 365 -nodes \
-out /path/to/pem/file -newkey rsa:2048 \
-keyout /path/to/key/file
