DCD-1525: upgrade image version for node 12

bitbucket-pipelines.yml

@@ -4,7 +4,7 @@
 #
 #    make > ../bitbucket-pipelines.yml
 
-image: debian:buster
+image: debian:bullseye
 options:
   size: 2x
 
@@ -363,11 +363,7 @@ pipelines:
              - docker
            script:
              - ./bin/install-ansible --dev
-             - apt-get update && apt-get install -y npm curl
-             - npm install npm@latest -g
-             - npm cache clean -f
-             - npm install -g n
-             - n stable
+             - apt-get update && apt-get install -y npm
              - npm install -g snyk
              - snyk auth $SNYK_TOKEN
              - pipenv run snyk monitor --severity-threshold=high --project-name=dc-deployments-automation