refactor: slim pipeline to test + build/push only

Remove Checkout stage (multibranch auto-checks out), Bump Helm Chart,
and Commit & Push stages. Drop tools container and chart env vars.
Image tag is now branch-random8 (e.g. main-a1b2c3d4).

Jenkinsfile

@@ -21,12 +21,6 @@ spec:
       value: ""
     args:
     - --insecure-registry=harbor-core.harbor.svc.cluster.local
-  - name: tools
-    image: alpine/git
-    command:
-    - sleep
-    args:
-    - infinity
 """
         }
     }
@@ -37,17 +31,9 @@ spec:
         HARBOR_PROJECT  = 'library'
         IMAGE           = "${HARBOR_REGISTRY}/${HARBOR_PROJECT}/${APP_NAME}"
         DOCKER_HOST     = 'tcp://localhost:2375'
-        CHART_FILE      = 'manifest/helm/Chart.yaml'
-        VALUES_FILE     = 'manifest/helm/values.yaml'
     }
 
     stages {
-        stage('Checkout') {
-            steps {
-                checkout scm
-            }
-        }
-
         stage('Install & Test') {
             steps {
                 container('node') {
@@ -59,6 +45,8 @@ spec:
 
         stage('Build & Push Image') {
             steps {
+                script {
+                    def imageTag = "${env.BRANCH_NAME.replaceAll('/', '-')}-${UUID.randomUUID().toString().take(8)}"
                     container('docker') {
                         withCredentials([usernamePassword(
                             credentialsId: 'harbor-credentials',
@@ -67,51 +55,13 @@ spec:
                         )]) {
                             sh """
                                 docker login ${HARBOR_REGISTRY} -u \${HARBOR_USER} -p \${HARBOR_PASS}
-                            docker build -t ${IMAGE}:${BUILD_NUMBER} .
-                            docker push ${IMAGE}:${BUILD_NUMBER}
-                        """
-                    }
-                }
-            }
-        }
-
-        stage('Bump Helm Chart') {
-            steps {
-                container('tools') {
-                    script {
-                        def content = readFile(CHART_FILE)
-                        def matcher = content =~ /version:\s+(\d+)\.(\d+)\.(\d+)/
-                        def newVersion = "${matcher[0][1]}.${matcher[0][2]}.${matcher[0][3].toInteger() + 1}"
-                        sh "sed -i 's/^version: .*/version: ${newVersion}/' ${CHART_FILE}"
-                        sh "sed -i 's/^appVersion: .*/appVersion: \"${BUILD_NUMBER}\"/' ${CHART_FILE}"
-                        sh "sed -i 's/^  tag: .*/  tag: ${BUILD_NUMBER}/' ${VALUES_FILE}"
-                    }
-                }
-            }
-        }
-
-        stage('Commit & Push') {
-            steps {
-                container('tools') {
-                    withCredentials([usernamePassword(
-                        credentialsId: 'gitea-credentials',
-                        usernameVariable: 'GIT_USER',
-                        passwordVariable: 'GIT_PASS'
-                    )]) {
-                        sh """
-                            git config user.email "jenkins@fireflylab.local"
-                            git config user.name "Jenkins"
-                            git add ${CHART_FILE} ${VALUES_FILE}
-                            git commit -m "ci: bump tictactoe chart to build ${BUILD_NUMBER}"
-                            REMOTE_URL=\$(git remote get-url origin)
-                            AUTH_URL=\$(echo \$REMOTE_URL | sed "s|https://|https://\${GIT_USER}:\${GIT_PASS}@|")
-                            BRANCH=\$(git rev-parse --abbrev-ref HEAD)
-                            git push \$AUTH_URL HEAD:\$BRANCH
+                                docker build -t ${IMAGE}:${imageTag} .
+                                docker push ${IMAGE}:${imageTag}
                             """
                         }
                     }
                 }
             }
         }
-
+    }
 }