Removes imagePrefix and updates image naming convention

Eliminates the imagePrefix variable for a cleaner image naming structure.

Utilizes the full distribution name for Docker image creation, ensuring consistency across different distributions.

This change simplifies the image naming process and improves clarity in the Jenkins pipeline.

Author: Vítězslav Dvořák

debian/Jenkinsfile

@@ -5,7 +5,6 @@
 String[] distributions = ['debian:bookworm', 'debian:trixie', 'debian:forky', 'ubuntu:jammy', 'ubuntu:noble']
 
 String vendor = 'vitexsoftware'
-String imagePrefix = 'multiflexi-'
 //String distroFamily = ''
 
 properties([
@@ -26,6 +25,7 @@ distributions.each { distro ->
         println  "Dist:" + distroName
 
         def dist = distroName.split(':')
+        def distroFamily = dist[0]
         def distroCode = dist[1]
         def buildImage = ''
         def artifacts = []
@@ -35,7 +35,7 @@ distributions.each { distro ->
             ansiColor('xterm') {
                 stage('Checkout ' + distroName) {
                     checkout scm
-                    def imageName = vendor + '/' + imagePrefix + distroCode + ':latest'
+                    def imageName = vendor + '/' + distro
                     buildImage = docker.image(imageName)
                     sh 'git checkout debian/changelog'
                     def version = sh (