add Dockerfile & chart directory

Dockerfile

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+# Dockerfile
+FROM docker.io/library/gradle:7.5.1-jdk11 AS build
+
+WORKDIR /app
+
+# add project
+ADD . /app/
+
+RUN gradle clean bootJar
+
+FROM docker.io/library/eclipse-temurin:11-jre-focal AS app
+
+WORKDIR /app
+COPY --from=build /app/build/libs/spring-petclinic-2.7.3.jar .
+
+EXPOSE 8080
+
+# server run
+ENTRYPOINT ["java"]
+CMD ["-jar", "/app/spring-petclinic-2.7.3.jar"]

chart/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

chart/Chart.yaml

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+apiVersion: v2
+name: chart
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "1.16.0"

chart/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Values.app.name }}
+  labels:
+    app: {{ .Values.app.name }}
+spec:
+  replicas: {{ .Values.app.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ .Values.app.name }}
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 1
+      maxSurge: 1
+  template:
+    metadata:
+      labels:
+        app: {{ .Values.app.name }}
+    spec:
+      {{- with .Values.app.hostAliases }}
+      hostAliases:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      containers:
+        - name: app
+          imagePullPolicy: Always
+          image: {{ .Values.app.image }}
+          {{- with .Values.app.resources }}
+          resources:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          command: [ "java" ]
+          args:
+            - "-jar"
+            - "spring-petclinic-2.7.3.jar"
+          {{- with .Values.app.env }}
+          env:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          ports:
+            - containerPort: 8080

chart/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: {{ .Values.app.name }}
+  name: {{ .Values.app.name }}-svc
+spec:
+  ports:
+    - name: petclinic
+      port: 80
+      protocol: TCP
+      targetPort: 8080
+  selector:
+    app: {{ .Values.app.name }}
+  type: {{ .Values.app.service.type }}

chart/values.yaml

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+app:
+  name: petclinic-k8s
+  profile:
+  replicaCount: 1
+  hostAliases: []
+  image: doubles.kr-central-1.kcr.dev/bella-test/test-img:latest
+  resources: {}
+  service:
+    type: LoadBalancer