Serve localhost:3000 as https://localhost.next or https://anything.localhost.next via caddy dnsmasq mkcert

serve-localhost-over-https-domain.zsh

# ~ dnsmasq.conf

brew install dnsmasq
touch $(brew --prefix)/etc/dnsmasq.conf
read -r -d '' VAR <<END
address=/.next/127.0.0.1
END
grep -Fqx $VAR $(brew --prefix)/etc/dnsmasq.conf || echo "$VAR" >>$(brew --prefix)/etc/dnsmasq.conf
sudo mkdir -p /etc/resolver && sudo zsh -c 'echo "nameserver 127.0.0.1" >/etc/resolver/next'
sudo brew services restart dnsmasq

# ~ mkcert

brew install mkcert nss
mkdir -p $(brew --prefix)/etc/caddy/certs && cd $(brew --prefix)/etc/caddy/certs
mkcert -install && mkcert 'localhost.next' && mkcert '*.localhost.next'

# ~ Caddyfile

brew install caddy
touch $(brew --prefix)/etc/Caddyfile
read -r -d '' VAR <<END
localhost.next {
  tls $(brew --prefix)/etc/caddy/certs/localhost.next.pem $(brew --prefix)/etc/caddy/certs/localhost.next-key.pem
  reverse_proxy localhost:3000
}

*.localhost.next {
  tls $(brew --prefix)/etc/caddy/certs/_wildcard.localhost.next.pem $(brew --prefix)/etc/caddy/certs/_wildcard.localhost.next-key.pem
  reverse_proxy localhost:3000
  header V-Host {labels.2}
}
END
grep -Fqx $VAR $(brew --prefix)/etc/Caddyfile || echo "$VAR" >>$(brew --prefix)/etc/Caddyfile
sudo brew services restart caddy