Minimise docker layers

.gitlab-ci.yml

@@ -15,7 +15,6 @@ stages:
  - check
  - build
 
-
 dockerimage_builder:
   stage: prepare
   before_script:
@@ -34,7 +33,6 @@ dockerimage_builder:
     refs:
       - schedules
 
-
 dockerimage_security_scanner:
   stage: prepare
   before_script:
@@ -71,18 +69,18 @@ security_scanner:
     - dedicated
 
 .squashfs_template: &squashfs_template
+  image: $DOCKER_IMAGE_BUILDER
   stage: build
-  before_script:
-    - apk add --no-cache make
   services:
-   - docker:dind
+    - docker:dind
   script:
-   - make images/debian-buster.squashfs
-   - find images -type f > images.txt
+    - scripts/packer.sh debian-buster
+    - scripts/torrent.sh debian-buster.squashfs
+    - find images -type f > images.txt
   artifacts:
     paths:
-     - images
-     - images.txt
+      - images
+      - images.txt
   tags:
     - fablab
     - ssd