gitlab-drupal-ci#48

- Copy docker-compose.yml into l3drun if it exists
- Only write to files that are writable
- Update to v2.2.17 of upstream image

start.sh

@@ -213,7 +213,7 @@ function setupAhoy {
     echo "ahoyapi: v2" >.ahoy.yml
     echo "commands:" >>.ahoy.yml
   fi
-  if [[ ! -L .ahoy.l3d ]]; then
+  if [[ ! -L .ahoy.l3d && -w . ]]; then
     ln -s /etc/ahoy .ahoy.l3d
   fi
   if [[ -f .gitignore ]]; then