Update 'README.md'

README.md

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 # ESP_smarthome_server
 
+This is a simple application to setup your own smarthome with some ESP8266.
+The server is based on Nodejs and can be run on a Raspberry Pi.
+You can change the public ports `8080` (web UI) and `8081` (websocket).
+To run the server simply execute `server.js`.
+```
+screen -A -m -d -S short_url nodejs server.js
+```
+It's recommended to use a reverse proxy like nginx.
+
+//good luck