Add pid killer (See docker-archive#22)

Author: Oscar Barrett

run.sh

@@ -10,4 +10,8 @@ fi
 
 source /etc/apache2/envvars
 tail -F /var/log/apache2/* &
+
+# Apache gets grumpy about PID files pre-existing
+rm -f /var/run/apache2/apache2.pid
+
 exec apache2 -D FOREGROUND