Update README.md

Author: AndrewMarchukov

README.md

@@ -3,13 +3,12 @@
 See no peers for some torrent(s)? Add more tracker(s) from Transmission
 
 ## Installation
-* Download script and make it executable:
-Edit settings for transmission set rpc-enabled, rpc-username and rpc-password
-```
+cd directory where Dockerfile `docker build -t transmission-tracker-add:latest .` or take image `docker pull andrewmhub/transmission-tracker-add`
 
-```
 
 ## Usage
-
+```
+docker run --net=host -d -e HOSTPORT=localhost:9091 -e TR_AUTH=user:password --name=transmission-tracker-add andrewmhub/transmission-tracker-add:latest
+```
 
 Don't be confused with `failed` message. In most cases, it means tracker(s) already added and/or exists in current torrent.