Create a self-signed SSL certificate for local development and testing

create-local-ssl.sh

#!/bin/bash

# SSL certificates should have a validity period of less than 398 days
#  * https://chromium.googlesource.com/chromium/src/+/master/net/docs/certificate_lifetimes.md
#  * https://support.apple.com/en-us/102028

# Create Private Key
openssl genrsa -out key.pem 2048

# Create Certificate Signing Request
openssl req -new -sha256 -key key.pem -out csr.csr

# Generate Self-Signed Certificate
openssl req -x509 -sha256 -days 397 -key key.pem -in csr.csr -out cert.pem