feat: configurable tracking image

templates/gitlab-ci-semrel.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 (use a public image - can be overridden)
   SEMREL_IMAGE: "node:latest"
   SEMREL_HOOKS_DIR: "."
@@ -531,7 +534,7 @@ stages:
 .semrel-base:
   image: $SEMREL_IMAGE
   services:
-    - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
+    - name: "$TBC_TRACKING_IMAGE"
       command: ["--service", "semrel", "2.2.6" ]
   before_script:
     - *semrel-scripts