update README

README.md

@@ -24,6 +24,8 @@ This package requires the keybase binary installed on your system, and works on
         enables command debugging to stdout
   -feedback-convid string
         sets the keybase chat1.ConvIDStr to send feedback to.
+  -feedback-team-advert string
+        sets the keybase team/channel to advertise feedback. @team#channel
   -log-convid string
         sets the keybase chat1.ConvIDStr to log debugging to keybase chat.
 ```
@@ -48,6 +50,7 @@ Required by this package: (Set the values you feel like, if you don't set them t
  - `BOT_DEBUG=true`
  - `BOT_LOG_CONVID=<your keybase conversation id>`
  - `BOT_FEEDBACK_CONVID=<your keybase conversation id>`
+ - `BOT_FEEDBACK_TEAM_ADVERT="@team#channel"`
 
 #### Example:
 `docker run --name myJitsi --rm -d -e KEYBASE_USERNAME=FOO -e KEYBASE_PAPERKEY="bar baz ..." -e KEYBASE_SERVICE=1 -e BOT_DEBUG=true haukeness/keybase-jitsi-bot`