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chart/Chart.yaml

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+apiVersion: v2
+name: todo-app
+description: A simple Flask-based Todo App hosted in a Docker container with Helm orchestration. The application exposes a single endpoint at '/' that returns 'Todo List'. Uses minimal dependencies and follows 12-factor principles for containerized deployment.
+type: application
+version: 0.1.0
+appVersion: "1.0.0"

chart/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: flask-todo-app
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: flask-todo-app
+  template:
+    metadata:
+      labels:
+        app: flask-todo-app
+    spec:
+      containers:
+      - name: flask-todo-app
+        image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
+        ports:
+        - containerPort: 5000
+        env:
+        - name: FLASK_APP
+          value: "{{ .Values.env.FLASK_APP }}"
+        - name: DEBUG
+          value: "{{ .Values.env.DEBUG }}"

chart/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Values.service.name }}
+spec:
+  ports:
+    - port: {{ .Values.service.port }}
+  selector:
+    app: {{ .Values.app.name }}

chart/values.yaml

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+image:
+  repository: flask-todo-app
+  tag: latest
+service:
+  port: 5000
+env:
+  FLASK_APP: app.py
+  DEBUG: "False"