Migrate build and release to ubuntu:jammy

.gitlab-ci.yml

@@ -8,6 +8,8 @@ stages:
 variables:
   DOCKER_EXE: docker
 
+image: registry.gitlab.ics.muni.cz:443/cloud/g2/container-registry/docker.io__ubuntu:jammy
+
 yamllint:
   stage: lint
   image:
@@ -20,7 +22,6 @@ yamllint:
 # build and release container image
 # ---------------------------------------------------------------------------
 build-image:
-  image: registry.gitlab.ics.muni.cz:443/cloud/g2/container-registry/debian:latest
   stage: build-image
   before_script:
     - apt-get update --yes
@@ -44,7 +45,6 @@ build-image:
 # release container image
 # ---------------------------------------------------------------------------
 release-image:
-  image: registry.gitlab.ics.muni.cz:443/cloud/g2/container-registry/debian:latest
   stage: release-image
   before_script:
     - apt-get update --yes