Make nginx configuration universal for all hosting services

- Replace specific *.serveo.net with universal server_name _
- Now works with localhost, ngrok, serveo, custom domains, and any tunneling service
- Remove service-specific limitations from configuration
- Update both fixed config and README documentation

Author: Maphikza

README.md

@@ -262,7 +262,7 @@ map $http_upgrade $connection_upgrade {
 
 server {
     listen 80;
-    server_name your-domain.com;  # Replace with your domain
+    server_name _;  # Accept all hostnames (localhost, ngrok, custom domains, etc.)
 
     # Forward client IP and protocol
     proxy_set_header X-Real-IP $remote_addr;

fixed_nginx_config.conf

@@ -24,7 +24,7 @@ map $http_upgrade $connection_upgrade {
 # Main server block listening on HTTP
 server {
     listen 80; # Nginx listens on port 80 locally
-    server_name localhost *.serveo.net _; # Dynamic - works with any serveo URL and localhost
+    server_name _; # Accept all hostnames (localhost, ngrok, custom domains, etc.)
 
     # Basic Security Headers
     add_header X-Frame-Options "SAMEORIGIN";