Add cachbust to dockerfile

.gitlab-ci.yml

@@ -60,7 +60,7 @@ build to production:
   script:
     # Using cache to speed up the build process
     - docker pull ${CI_REGISTRY_IMAGE}:latest || true
-    - docker build --cache-from ${CI_REGISTRY_IMAGE}:latest --tag ${CI_REGISTRY_IMAGE}:production${CI_COMMIT_SHORT_SHA} --tag ${CI_REGISTRY_IMAGE}:latest .
+    - docker build --cache-from ${CI_REGISTRY_IMAGE}:latest --build-arg CACHEBUST=$(date +%s) --tag ${CI_REGISTRY_IMAGE}:production${CI_COMMIT_SHORT_SHA} --tag ${CI_REGISTRY_IMAGE}:latest .
     - docker push ${CI_REGISTRY_IMAGE}:production${CI_COMMIT_SHORT_SHA}
     - docker push ${CI_REGISTRY_IMAGE}:latest
   rules:

Dockerfile

@@ -195,6 +195,9 @@ RUN pip install .
 # Install all of the package dependencies of the tutorials
 # ================================================================================
 
+ARG CACHEBUST
+RUN echo "$CACHEBUST"
+
 WORKDIR /opt/tutorials
 COPY tutorials/ .