NOTE: Run the following commands in linux environment to get private and public keys and copy/paste in your environment variables
ssh-keygen -t rsa -b 4096 -m PEM -f rs256.key
(NOTE: Don't add passphrase)
openssl rsa -in rs256.key -pubout -outform PEM -out rs256.key.pub
cat rs256.key
cat rs256.key.pub