docs: Replace specific domain with generic placeholder

- Changed qr.moto-adv.com to [your-domain] throughout documentation
- Made documentation more generic and reusable for any deployment
- Updated Nginx configuration examples with placeholder domain
- Standardized domain references in all configuration sections

README.md

@@ -290,7 +290,7 @@ The application is fully containerized with Docker:
    SECRET_KEY=your-super-secret-key-here
    ADMIN_USERNAME=your-admin-username
    ADMIN_PASSWORD=your-secure-password
-   APP_DOMAIN=qr.moto-adv.com  # Your custom domain for URL shortener
+   APP_DOMAIN=[your-domain]  # Your custom domain for URL shortener
    ```
 
 2. **Deploy:**
@@ -303,7 +303,7 @@ The application is fully containerized with Docker:
 The URL shortener feature uses the `APP_DOMAIN` environment variable to generate short URLs:
 
 - **Development**: `APP_DOMAIN=localhost:5000`
-- **Production**: `APP_DOMAIN=qr.moto-adv.com` or `APP_DOMAIN=https://qr.moto-adv.com`
+- **Production**: `APP_DOMAIN=[your-domain]` or `APP_DOMAIN=https://[your-domain]`
 
 Short URLs will be available at: `https://[your-domain]/s/[short-code]`
 
@@ -320,7 +320,7 @@ When deploying behind a reverse proxy like Nginx Proxy Manager or standard Nginx
 ### Nginx Proxy Manager Setup
 
 1. **Create Proxy Host**:
-   - Domain: `qr.moto-adv.com` (your domain)
+   - Domain: `[your-domain]` (your domain)
    - Forward Hostname/IP: `your-server-ip`
    - Forward Port: `8066`
    - **Protocol**: HTTP (not HTTPS)
@@ -344,7 +344,7 @@ When deploying behind a reverse proxy like Nginx Proxy Manager or standard Nginx
 ```nginx
 server {
     listen 443 ssl http2;
-    server_name qr.moto-adv.com;
+    server_name [your-domain];
 
     # SSL Configuration
     ssl_certificate /path/to/ssl/cert.pem;
@@ -365,7 +365,7 @@ server {
 # Redirect HTTP to HTTPS
 server {
     listen 80;
-    server_name qr.moto-adv.com;
+    server_name [your-domain];
     return 301 https://$server_name$request_uri;
 }
 ```
@@ -389,7 +389,7 @@ services:
     ports:
       - "8066:5000"  # Maps container port 5000 to host port 8066
     environment:
-      - APP_DOMAIN=qr.moto-adv.com  # Your public domain
+      - APP_DOMAIN=[your-domain]  # Your public domain
 ```
 
 ## 📱 Usage
@@ -420,7 +420,7 @@ services:
 
 **Examples:**
 - Original: `https://very-long-domain.com/extremely/long/path/to/resource`
-- Short: `https://qr.moto-adv.com/s/abc123`
+- Short: `https://[your-domain]/s/abc123`
 
 ## 🛡️ Security Features