Add CI/CD setup

Jenkinsfile

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+podTemplate(
+yaml: '''
+    apiVersion: v1
+    kind: Pod
+    spec:
+      containers:
+      - name: docker
+        image: docker:24.0.7-cli
+        command:
+        - sleep
+        args:
+        - 99d
+        resources:
+          requests:
+            cpu: "512m"
+            memory: "1Gi"
+          limits:
+            memory: "1Gi"
+      - name: helmfile
+        image: ghcr.io/helmfile/helmfile:v0.158.1
+        command:
+        - sleep
+        args:
+        - 99d
+''') {
+  node(POD_LABEL) {
+    ansiColor('xterm') {
+      stage('Checkout') {
+        checkout scm
+      }
+      container('docker') {
+        stage('build and push image') {
+          withCredentials([file(credentialsId: 'harbor-docker-config', variable: 'DOCKER_CONFIG_FILE')]) {
+            sh "mkdir .docker"
+            sh "cp ${DOCKER_CONFIG_FILE} ${WORKSPACE}/.docker/config.json"
+            withEnv(["DOCKER_CONFIG=${WORKSPACE}/.docker/"]) {
+
+              sh """
+                docker buildx create --name buildkitd --driver remote tcp://buildkitd.buildkitd.svc.cluster.local:12345
+                docker buildx use buildkitd
+                docker buildx install
+                docker build --push -t core.harbor.koebele-online.de/library/project-x:$BUILD_NUMBER .
+              """
+
+            }
+          }
+        }
+      }
+      container('helmfile') {
+        withCredentials([usernamePassword(credentialsId: 'harbor-robot', passwordVariable: 'HARBOR_PASSWORD', usernameVariable: 'HARBOR_USER')]) {
+          stage('helmfile lint') {
+            sh 'helmfile lint'
+          }
+          if (env.BRANCH_NAME == "main") {
+            stage('helmfile sync') {
+              sh 'helmfile sync'
+            }
+          }
+        }
+      }
+    }
+  }
+}

helmfile.yaml

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+repositories:
+  - name: gabibbo97
+    url: https://gabibbo97.github.io/charts/
+  - name: bjw-s
+    url: https://bjw-s.github.io/helm-charts
+
+releases:
+  - name: project-x
+    namespace: project-x
+    chart: bjw-s
+    values:
+      - controllers:
+          main:
+            imagePullSecrets:
+              - registry-credentials
+            strategy: Recreate
+            containers:
+              main:
+                image:
+                  repository: core.harbor.koebele-online.de/library/project-x
+                  tag: {{ requiredEnv "BUILD_NUMBER"}}
+                  pullPolicy: IfNotPresent
+      - service:
+          main:
+            ports:
+              http:
+                port: 80
+      - ingress:
+          main:
+            enabled: true
+            annotations:
+              kubernetes.io/ingress.class: "nginx"
+              cert-manager.io/cluster-issuer: "letsencrypt-prod"
+            hosts:
+              - host: project-x.moritz.koebele-online.de
+                paths:
+                  - path: /
+                    pathType: ImplementationSpecific
+                    service:
+                      name: main
+                      port: http
+            tls:
+              - hosts:
+                  - project-x.moritz.koebele-online.de
+                secretName: epaper-weekly-calendar-tls
+    wait: true
+  - name: imagepullsecrets
+    namespace: project-x
+    chart: gabibbo97/imagepullsecrets
+    version: 3.0.0
+    values:
+      - imagePullSecret:
+          secretName: registry-credentials
+          registryURL: core.harbor.koebele-online.de
+          username: {{ requiredEnv "HARBOR_USER"}}
+          password: {{ requiredEnv "HARBOR_PASSWORD"}}