Match logformat to othe stepup components

Removed CustomLog directive and APP_ENV variable.

Author: phavekes

docker/conf/middleware-apache2.conf

@@ -1,10 +1,10 @@
 <Virtualhost *:80>
     ServerName  middleware
     ServerAdmin admin@surf.nl
-    CustomLog /proc/self/fd/1 stepup
+
     DocumentRoot /var/www/html/public
+
     SetEnv HTTPS on
-    SetEnv APP_ENV prod
     SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1
 
     <Directory "/var/www/html/public">