Use containers/jug/xl.Dockerfile as base for oneapi_jug_xl

We use sed to replace base image to oneapi_jug_dev and pipe to
docker build for oneapi_jug_xl image.

.gitlab-ci.yml

@@ -272,8 +272,8 @@ oneapi_jug_xl:default:
   script:
     - cp containers/jug/setup_detectors.py containers/oneapi
     - cp detectors.yaml containers/oneapi
-    - docker build -t ${CI_REGISTRY_IMAGE}/${BUILD_IMAGE}:${INTERNAL_TAG} 
-                   -f containers/oneapi/onexl.Dockerfile
+    - sed 's/^FROM.*$/FROM ${DOCKER_REGISTRY}oneapi_jug_dev:${INTERNAL_TAG}/' containers/jug/xl.Dockerfile | \ 
+      docker build - -t ${CI_REGISTRY_IMAGE}/${BUILD_IMAGE}:${INTERNAL_TAG} 
                    --build-arg INTERNAL_TAG=${INTERNAL_TAG}
                    --build-arg JUGGLER_VERSION=${JUGGLER_VERSION}
                    --build-arg NPDET_VERSION=${NPDET_VERSION}
@@ -298,8 +298,8 @@ oneapi_jug_xl:nightly:
   script:
     - cp containers/jug/setup_detectors.py containers/oneapi
     - cp detectors.yaml containers/oneapi
-    - docker build -t ${CI_REGISTRY_IMAGE}/${BUILD_IMAGE}:${NIGHTLY_TAG} 
-                   -f containers/oneapi/onexl.Dockerfile
+    - sed 's/^FROM.*$/FROM ${DOCKER_REGISTRY}oneapi_jug_dev:${INTERNAL_TAG}/' containers/jug/xl.Dockerfile | \ 
+      docker build - -t ${CI_REGISTRY_IMAGE}/${BUILD_IMAGE}:${NIGHTLY_TAG}
                    --build-arg INTERNAL_TAG=${INTERNAL_TAG}
                    --build-arg JUG_VERSION=nightly-$(date +%Y-%m-%d_%H-%M-%S)-${INTERNAL_TAG}-$(git rev-parse HEAD)
                    --build-arg NIGHTLY=1