feat: add NGINX installer and update README (#146)

* feat: add NGINX installer script for zero-knowledge setup

- Created a new installer script for NGINX-based setups.
- The script automates Docker, NGINX, Let's Encrypt, and Neko Rooms configuration.
- Designed for users who prefer NGINX as a reverse proxy instead of Traefik.

* docs: update README to include zero-knowledge installation instructions with NGINX

* feat: enhance IP retrieval method and add user prompt for domain continuation

* docs: update README to streamline zero-knowledge installation instructions and clarify NGINX usage

* feat: update IP retrieval fallback service to use checkip.amazonaws.com

README.md

@@ -16,18 +16,25 @@ Simple room management system for [n.eko](https://github.com/m1k1o/neko). Self h
   <img src="https://github.com/m1k1o/neko-rooms/raw/master/docs/neko.gif" alt="n.eko">
 </div>
 
-## Zero-knowledge installation (with HTTPS and Traefik)
+## Zero-knowledge installation (with HTTPS)
 
-If you don't have any clue about docker and stuff but only want to have fun with friends in a shared browser, we got you covered!
+No experience with Docker and reverse proxy? No problem! Follow these steps to set up your Neko Rooms quickly and securely:
 
 - Rent a VPS with public IP and OS Ubuntu.
 - Get a domain name pointing to your IP (you can even get some for free).
 - Run install script and follow instructions.
-- Secure using HTTPs thanks to Let's Encrypt and Traefik.
+- Secure using HTTPs thanks to Let's Encrypt and Traefik or NGINX.
 
+### Traefik version
 ```bash
-wget -O neko-rooms.sh https://raw.githubusercontent.com/m1k1o/neko-rooms/master/traefik/install
-sudo bash neko-rooms.sh
+wget -O neko-rooms-traefik.sh https://raw.githubusercontent.com/m1k1o/neko-rooms/master/traefik/install
+sudo bash neko-rooms-traefik.sh
+```
+
+### NGINX version
+```bash
+wget -O neko-rooms-nginx.sh https://raw.githubusercontent.com/m1k1o/neko-rooms/master/nginx/install
+sudo bash neko-rooms-nginx.sh
 ```
 
 ## How to start