Update .gitlab-ci.yml

.gitlab-ci.yml

-# recipe for building singularity image and deploy it on the registery for bwa version 0.7.17
-image:
-   name: quay.io/singularity/singularity:v3.4.0
-   entrypoint: [""]
+# recipe for building singularity image and deploy it on the registery for template
+image: nextflow/nextflow
 
 stages:
  - build
  - deploy
+ - push
+ 
+push:
+  script:
+     - nextflow run ./main.nf
+     - nextflow run ./main.nf --help
 
 # Build Singularity container bwa_v0.7.17.sif
 singularity-image:
+   image: quay.io/singularity/singularity:v3.4.0
    stage: build
    script:
        - singularity build template.sif Singularityfile
@@ -23,6 +28,7 @@ singularity-image:
 
 # Push the image template.sif on the registry
 deploy:
+   image: quay.io/singularity/singularity:v3.4.0
    stage: deploy
    script:
        - singularity push --docker-username "${CI_REGISTRY_USER}" --docker-password "${CI_REGISTRY_PASSWORD}" template.sif oras://"$CI_REGISTRY_IMAGE"/"$CI_PROJECT_NAME":"$CI_COMMIT_TAG"