do_reverseproxy/sites-available/fhem.nginx

# Fhem server configuration
server {
		listen 80;
		server_name fhem.metzner.selfhost.bz;

		access_log            /var/log/nginx/fhem.metzner.access.log;
		error_log            /var/log/nginx/fhem.metzner.error.log;

		location / {

			proxy_set_header        Host $host;
			proxy_set_header        X-Real-IP $remote_addr;
			proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
			proxy_set_header        X-Forwarded-Proto $scheme;
	  	proxy_pass          http://192.168.1.59:8083;
			proxy_read_timeout  90;
		}
		location /fhem {
			proxy_pass http://192.168.1.59:8083/fhem;
			proxy_http_version 1.1;
			proxy_set_header Upgrade $http_upgrade;
			proxy_buffering off;
			proxy_ignore_client_abort off;
			break;
		}
	}