Nginx Setup Guide

1. Configure HTTPS and Reverse Proxy

Create an Nginx configuration file for your domain gmlf.YourSite.

server {
    listen 80;
    server_name gmlf.YourSite;
    return 301 https://$host$request_uri; # Redirect all requests to HTTPS
}

server {
    listen 443 ssl;
    server_name gmlf.YourSite;

    ssl_certificate /etc/letsencrypt/live/gmlf.YourSite/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/gmlf.YourSite/privkey.pem;

    location / {
        proxy_pass http://127.0.0.1:5003;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Hwid $http_x_hwid;
        proxy_cache_bypass $http_upgrade;
    }
}

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2. Check Configuration and Restart Service

To check the syntax of the configuration file, run:

nginx -t

Expected output:

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

If there are no errors, restart the Nginx service:

service nginx restart

After a successful restart, the Frontend and Backend will be accessible via HTTPS:

https://gmlf.YourSite

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3. Install and Configure Let's Encrypt SSL Certificate

On the server acting as a proxy, install the required packages:

sudo apt update
sudo apt install -y certbot python3-certbot-nginx

After installation, initiate the SSL certificate issuance:

certbot certonly --nginx -d gmlf.YourSite

During the first run, you will need to:

• Provide a valid email address.
• Agree to the terms of service by entering Y.

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4. Cloudflare Configuration (if used)

If your domain is managed via Cloudflare:

1. Go to the SSL/TLS section in the Cloudflare panel.
2. Ensure the connection shows locked icons on both sides.
3. Click Configure → Custom SSL/TLS.
4. Set the mode to FULL.

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5. Finalizing Setup

After completing all steps:

• The server will be accessible via HTTPS;
• Requests will be correctly proxied to the backend (port 5003);
• A valid Let's Encrypt certificate will be in use;
• Configuration will be compatible with Cloudflare Full SSL mode.