Update README.md

Added "Installation on public server"

README.md

@@ -91,6 +91,44 @@ docker compose up
 ```
 <br/>
 
+### 🌎 Installation on public server
+Subdomain is puter. Replace "domain.com" with your domain name.
+
+#### -Create DNS entries for puter.domain.com and api.puter.domain.com, both pointing to the same IP.
+
+#### -Create apache domain configs for puter.domain.com and api.puter.domain.com and add reverse proxy entries for both subdomains
+```$ a2enmod proxy```
+```$ a2enmod proxy_http```
+
+
+##### /etc/apache/sites-enabled/--configfile---
+```
+ProxyPass / http://localhost:4100/
+ProxyPassReverse / http://localhost:4100/
+```
+#### -Edit ./src/backend/src/config.js
+add after let config = {};
+```config.api_base_url = 'https://api.puter.domain.com';
+config.origin='https://puter.domain.com';
+config.http_port=443;´
+config.pub_port=443;
+config.protocol='https';
+```
+
+#### -Edit ./node_modules/@heyputer/backend/src/services/WebServerService.js and  ./src/backend/src/services/WebServerService.js
+search for
+```if (allowedDomains.some(allowedDomain => hostName ===```
+and change the line to
+```if (allowedDomains.some(allowedDomain => hostName === "puter.domain.com" || hostName.endsWith('.' + allowedDomain))) {```
+
+#### -Edit ./volatile/config/config.json
+change ```"domain": "puter.localost"``` to ```"domain": "puter.domain.com"```
+
+#### -Run sed to replace the domain in all remaining files
+``` grep -rl "puter.localhost:4100" . | xargs sed -i 's/puter.localhost:4001/puter.domain.com/g' ```
+<br>
+<br>
+
 ### ☁️ Puter.com
 
 Puter is available as a hosted service at [**puter.com**](https://puter.com).