feat: configurable tracking image

templates/gitlab-ci-puppeteer.yml

@@ -14,6 +14,9 @@
 # Floor, Boston, MA  02110-1301, USA.
 # =========================================================================================
 variables:
+  # variabilized tracking image
+  TBC_TRACKING_IMAGE: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
+
   # Default Docker image (can be overridden)
   PUPPETEER_IMAGE: "buildkite/puppeteer:latest"
   PUPPETEER_PROJECT_DIR: "."
@@ -195,7 +198,7 @@ puppeteer:
     paths:
       - $PUPPETEER_PROJECT_DIR/.npm/
   services:
-    - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
+    - name: "$TBC_TRACKING_IMAGE"
       command: ["--service", "puppeteer", "2.0.1"]
   stage: acceptance
   before_script: