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how to install let's encrypt certificate with express and node.js ?

how to install let’s encrypt certificate with express and node.js ?


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KFSys
Site Moderator
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January 23, 2023

Hi @4f4cefbb8aa1434c9446051567aea7,

I would assume you are using Nginx as a reverse proxy, am I right? If yes then using Certbot to auto-install certificates should do the trick for you. Just auto-deploy:

Alternatively, you can run the following :

  1. # Create the SSL certificate
  2. certbot certonly --standalone

This will generate a certificate for you for your domain. Once you have it, you can add the following to your Nginx reverse proxy configuration:

# HTTPS — proxy all requests to the Node app
server {
    # Enable HTTP/2
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name app.example.com;

    # Use the Let’s Encrypt certificates
    ssl_certificate /etc/letsencrypt/live/app.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/app.example.com/privkey.pem;

    # Include the SSL configuration from cipherli.st
    include snippets/ssl-params.conf;

    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-NginX-Proxy true;
        proxy_pass http://localhost:8000/;
        proxy_ssl_session_reuse off;
        proxy_set_header Host $http_host;
        proxy_cache_bypass $http_upgrade;
        proxy_redirect off;
    }
}

Where proxy_pass http://localhost:8000/ will have the port of your application.