HTTPS / SSL

sudo apt install certbot python3-certbot-nginx
sudo certbot --nginx -d example.com

sudo certbot renew --dry-run

sudo apt install certbot python3-certbot-apache
sudo certbot --apache

const https = require('https');
const fs = require('fs');
const options = {
  key: fs.readFileSync('key.pem'),
  cert: fs.readFileSync('cert.pem')
};
https.createServer(options, app).listen(443);

server.port=8443
server.ssl.key-store-type=PKCS12
server.ssl.key-store=classpath:keystore.p12
server.ssl.key-store-password=changeit

m := &autocert.Manager{
  Prompt: autocert.AcceptTOS,
  Cache:  autocert.DirCache("certs"),
  HostPolicy: autocert.HostWhitelist("example.com"),
}
s := &http.Server{
  Addr: ":https",
  TLSConfig: m.TLSConfig(),
}