[buildbot] buildmaster: fix permissions

[LEDE Commits]

ynezz pushed a commit to buildbot.git, branch master:
https://git.openwrt.org/16616668ef7431488fcedf7e15e79cd7dabfeb73

commit 16616668ef7431488fcedf7e15e79cd7dabfeb73
Author: Petr Štetiar <ynezz at true.cz>
AuthorDate: Fri Mar 5 09:14:55 2021 +0100

    buildmaster: fix permissions
    
    Otherwise buildbot wouldn't be able to access config.ini or certs and thus fail
    to start:
    
     2021-03-05 08:08:18+0000 [-] Loading configuration from '/phase1/master.cfg'
     2021-03-05 08:08:18+0000 [-] error while parsing config file:
     ...
     configparser.NoSectionError: No section: 'general'
    
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 docker/buildmaster/files/entry.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docker/buildmaster/files/entry.sh b/docker/buildmaster/files/entry.sh
index 82d8b15..437ad41 100644
--- a/docker/buildmaster/files/entry.sh
+++ b/docker/buildmaster/files/entry.sh
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 
-chown buildbot:buildbot /master
+chown --recursive buildbot:buildbot /master /config /certs
+chmod 0700 /master /config /certs
 
 /usr/sbin/gosu buildbot /start.sh "$@"