ci: refs #6695 update Jenkinsfile and docker-compose.yml to use COMPOSE_TAG for branch targeting

Jenkinsfile

@@ -20,8 +20,6 @@ node {
             'beta'
         ]
 
-        TARGET_BRANCH = PROTECTED_BRANCH.contains(env.CHANGE_TARGET) ? env.CHANGE_TARGET : "dev"
-
         IS_PROTECTED_BRANCH = PROTECTED_BRANCH.contains(env.BRANCH_NAME)
         IS_LATEST = ['master', 'main'].contains(env.BRANCH_NAME)
 
@@ -112,6 +110,7 @@ pipeline {
                         CREDENTIALS = credentials('docker-registry')
                         COMPOSE_PROJECT = "${PROJECT_NAME}-${env.BUILD_ID}"
                         COMPOSE_PARAMS = "-p ${env.COMPOSE_PROJECT} -f test/cypress/docker-compose.yml --project-directory ."
+                        COMPOSE_TAG = PROTECTED_BRANCH.contains(env.CHANGE_TARGET) ? env.CHANGE_TARGET : 'dev'
                     }
                     steps {
                         script {

test/cypress/docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3.7'
 services:
     back:
-        image: 'registry.verdnatura.es/salix-back:${TARGET_BRANCH:-dev}'
+        image: 'registry.verdnatura.es/salix-back:${COMPOSE_TAG:-dev}'
         volumes:
             - ./test/cypress/storage:/salix/storage
             - ./test/cypress/back/datasources.json:/salix/loopback/server/datasources.json
@@ -18,4 +18,4 @@ services:
             - TZ
         dns_search: .
     db:
-        image: 'registry.verdnatura.es/salix-db:${TARGET_BRANCH:-dev}'
+        image: 'registry.verdnatura.es/salix-db:${COMPOSE_TAG:-dev}'