[buildbot] buildworker: provide OpenWrt version in description

[LEDE Commits]

ynezz pushed a commit to buildbot.git, branch master:
https://git.openwrt.org/bcaa5ec91a1092090a9e146e02ae2e6b260f7d34

commit bcaa5ec91a1092090a9e146e02ae2e6b260f7d34
Author: Petr Štetiar <ynezz at true.cz>
AuthorDate: Thu Mar 25 11:21:04 2021 +0100

    buildworker: provide OpenWrt version in description
    
    So it's clear to anyone which version is actually deployed.
    
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 docker/buildworker/Dockerfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docker/buildworker/Dockerfile b/docker/buildworker/Dockerfile
index ae62c7f..bad2759 100644
--- a/docker/buildworker/Dockerfile
+++ b/docker/buildworker/Dockerfile
@@ -3,10 +3,11 @@ MAINTAINER  OpenWrt Maintainers
 
 ARG         DEBIAN_FRONTEND=noninteractive
 ARG         BUILDBOT_VERSION=2.10.1
+ARG         OPENWRT_VERSION=unknown
 
 ENV         BUILDWORKER_MASTER builds.openwrt.org:9990
 ENV         BUILDWORKER_ADMIN contact at openwrt.org
-ENV         BUILDWORKER_DESCRIPTION Buildworker Docker Instance
+ENV         BUILDWORKER_DESCRIPTION Docker Container https://git.openwrt.org/$OPENWRT_VERSION
 
 USER root