Updated location of cta-frontend log file in container startup script.

This fixes frontend failing to start on file permission error.

continuousintegration/docker/ctafrontend/cc7/opt/run/bin/ctafrontend.sh

@@ -48,9 +48,9 @@ echo -n "Waiting for /etc/cta-frontend.krb5.keytab"
 for ((;;)); do test -e /etc/cta-frontend.krb5.keytab && break; sleep 1; echo -n .; done
 echo OK
 
-touch /cta-frontend.log
-chmod a+w /cta-frontend.log
-tail -F /cta-frontend.log &
+touch /var/log/cta/cta-frontend.log
+chmod a+w /var/log/cta/cta-frontend.log
+tail -F /var/log/cta/cta-frontend.log &
 
 echo "Launching frontend"
 runuser --shell='/bin/bash' --session-command='cd ~cta; xrootd -n cta -c /etc/xrootd/xrootd-cta.cfg -I v4' cta