fix(ci): adjust CI so we don't accidentally overwrite and use a pinne…

…d base (#455)

* fix(ci): don't overwrite the base image

* fix(pin): explicitely pin the base image

Makefile

@@ -390,6 +390,5 @@ cleanup: cleanup-tests cleanup-build
 update-cache-images:
 	-$(UPDATE_CACHE_COMMAND) $(DOCKER_REPOSITORY):$(PACKAGE_TYPE)-$(DOCKER_BASE_SUFFIX)
 	-docker tag $(DOCKER_REPOSITORY):$(PACKAGE_TYPE)-$(DOCKER_BASE_SUFFIX) $(DOCKER_REPOSITORY):$(PACKAGE_TYPE) || true
-	-$(UPDATE_CACHE_COMMAND) $(DOCKER_REPOSITORY):$(PACKAGE_TYPE) || true
 	-$(UPDATE_CACHE_COMMAND) $(DOCKER_REPOSITORY):openresty-$(PACKAGE_TYPE)-$(DOCKER_OPENRESTY_SUFFIX)
 	-$(UPDATE_CACHE_COMMAND) $(DOCKER_REPOSITORY):kong-$(PACKAGE_TYPE)-$(DOCKER_KONG_SUFFIX)

dockerfiles/Dockerfile.openresty

@@ -2,7 +2,7 @@ ARG DOCKER_BASE_SUFFIX
 ARG DOCKER_REPOSITORY
 ARG PACKAGE_TYPE
 
-FROM kong/kong-build-tools:$PACKAGE_TYPE
+FROM kong/kong-build-tools:$PACKAGE_TYPE-1.5.12
 
 ARG EDITION="community"
 ENV EDITION $EDITION