Add link for lavarell logs to stderr

Signed-off-by: solidnerd <niclas@mietz.io>

Author: solidnerd

docker-entrypoint.sh

@@ -79,6 +79,7 @@ if [ ! -f '/var/www/BookStack/.env' ]; then
       MAIL_ENCRYPTION=${MAIL_ENCRYPTION:-null}
       # URL used for social login redirects, NO TRAILING SLASH
 EOF
+sed -ie "s/single/errorlog/g" config/app.php
     else
         echo >&2 'error: missing DB_HOST environment variable'
         exit 1