Generate a local SSL certificate. Make sure to install mkcert first [brew install mkcert]

ssl-check

function ssl-check() {
   f=~/.localhost_ssl;
   ssl_crt=$f/server.crt
   ssl_key=$f/server.key
   b=$(tput bold)
   c=$(tput sgr0)
 
   local_ip=$(ipconfig getifaddr $(route get default | grep interface | awk '{print $2}'))
   # local_ip=999.999.999 # (uncomment for testing)
 
   domains=(
       "localhost"
       "$local_ip"
   )
 
   if [[ ! -f $ssl_crt ]]; then
       echo -e "\n🛑  ${b}Couldn't find a Slate SSL certificate:${c}"
       make_key=true
   elif [[ ! $(openssl x509 -noout -text -in $ssl_crt | grep $local_ip) ]]; then
       echo -e "\n🛑  ${b}Your IP Address has changed:${c}"
       make_key=true
   else
       echo -e "\n✅  ${b}Your IP address is still the same.${c}"
   fi
 
   if [[ $make_key == true ]]; then
       echo -e "Generating a new Slate SSL certificate...\n"
       count=$(( ${#domains[@]} - 1))
       mkcert ${domains[@]}
 
       # Create Slate's default certificate directory, if it doesn't exist
       test ! -d $f && mkdir $f
 
       # It appears mkcert bases its filenames off the number of domains passed after the first one.
       # This script predicts that filename, so it can copy it to Slate's 
default location.
       if [[ $count = 0 ]]; then
           mv ./localhost.pem $ssl_crt
           mv ./localhost-key.pem $ssl_key
       else
           mv ./localhost+$count.pem $ssl_crt
           mv ./localhost+$count-key.pem $ssl_key
       fi
   fi
}