docs: guide for multi stage delivery

docs/docs/guides/assets/multi-stage-delivery/application-dev.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-frontend
+  namespace: podtato-head-dev
+spec:
+  selector:
+    matchLabels:
+      app: podtato-head-frontend
+  template:
+    metadata:
+      labels:
+        app: podtato-head-frontend
+        app.kubernetes.io/name: podtato-head-frontend
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/version: {{.Values.serviceVersion}}
+    spec:
+      containers:
+        - image: ghcr.io/podtato-head/podtato-server:{{.Values.serviceVersion}}
+          name: podtato-head-service
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 9000
+              name: http
+              protocol: TCP
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app.kubernetes.io/part-of: podtato-head
+  name: podtato-head-frontend
+  namespace: podtato-head-dev
+spec:
+  ports:
+    - name: http
+      port: 8080
+      targetPort: 9000
+      protocol: TCP
+  selector:
+    app: podtato-head-frontend
+  type: ClusterIP
+---
+apiVersion: lifecycle.keptn.sh/v1beta1
+kind: KeptnAppContext
+metadata:
+  name: podtato-head
+  namespace: podtato-head-dev
+spec:
+  postDeploymentTasks:
+    - post-deployment
+  promotionTasks:
+    - promote
+  metadata:
+    commitID: {{.Values.commitID}}
+---
+apiVersion: lifecycle.keptn.sh/v1beta1
+kind: KeptnTaskDefinition
+metadata:
+  name: post-deployment
+  namespace: podtato-head-dev
+spec:
+  function:
+    inline:
+      code: |
+        console.log("deployment completed");
+---
+apiVersion: lifecycle.keptn.sh/v1beta1
+kind: KeptnTaskDefinition
+metadata:
+  name: promote
+  namespace: podtato-head-dev
+spec:
+  function:
+    secureParameters:
+      secret: github-token
+    inline:
+      code: |
+        let secureDataText = Deno.env.get("SECURE_DATA");
+        let secureData;
+        if (secureDataText != "") {
+            secureData = JSON.parse(secureDataText);
+        }
+        let contextText = Deno.env.get("KEPTN_CONTEXT");
+        let context;
+        if (contextText != "") {
+          context = JSON.parse(contextText);
+        }
+        let body = `{"ref":"main","inputs":{"traceParent":"${context.metadata.traceparent}"}}`;
+        let resp = await fetch(
+          "https://api.github.com/repos/" + secureData.githubRepoOwner + "/" + secureData.githubRepo + "/actions/workflows/promote.yaml/dispatches",
+          {
+            method: "POST",
+            body: body,
+            headers: {
+              'Accept': 'application/vnd.github+json',
+              'Authorization': `Bearer ${secureData.apiToken}`,
+              'X-GitHub-Api-Version': '2022-11-28'
+          },
+        });
+        console.log(resp);

docs/docs/guides/assets/multi-stage-delivery/application-production.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-frontend
+  namespace: podtato-head-production
+spec:
+  selector:
+    matchLabels:
+      app: podtato-head-frontend
+  template:
+    metadata:
+      labels:
+        app: podtato-head-frontend
+        app.kubernetes.io/name: podtato-head-frontend
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/version: {{.Values.serviceVersion}}
+    spec:
+      containers:
+        - image: ghcr.io/podtato-head/podtato-server:{{.Values.serviceVersion}}
+          name: podtato-head-service
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 9000
+              name: http
+              protocol: TCP
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app.kubernetes.io/part-of: podtato-head
+  name: podtato-head-frontend
+  namespace: podtato-head-production
+spec:
+  ports:
+    - name: http
+      port: 8080
+      targetPort: 9000
+      protocol: TCP
+  selector:
+    app: podtato-head-frontend
+  type: ClusterIP
+---
+apiVersion: lifecycle.keptn.sh/v1beta1
+kind: KeptnAppContext
+metadata:
+  name: podtato-head
+  namespace: podtato-head-production
+spec:
+  metadata:
+    commitID: {{.Values.commitID}}

docs/docs/guides/assets/multi-stage-delivery/argo-app-dev.yaml

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+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: podtato-head-dev
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: 'https://github.com/<repo-owner>/<repo>'
+    path: dev
+    targetRevision: main
+    helm:
+      parameters:
+        - name: "commitID" # (1)!
+          value: "$ARGOCD_APP_REVISION"
+  destination:
+    server: 'https://kubernetes.default.svc'
+    namespace: podtato-head-dev
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true

docs/docs/guides/assets/multi-stage-delivery/argo-app-production.yaml

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+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: podtato-head-prod
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: 'https://github.com/<repo-owner>/<repo>'
+    path: production
+    targetRevision: main
+    helm:
+      parameters:
+        - name: "commitID" # (1)!
+          value: "$ARGOCD_APP_REVISION"
+  destination:
+    server: 'https://kubernetes.default.svc'
+    namespace: podtato-head-production
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true

docs/docs/guides/assets/multi-stage-delivery/chart.yaml

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+apiVersion: v2
+name: podtato-head
+kubeVersion: ">= 1.24.0-0"
+type: application
+version: 0.1.0
+appVersion: "v0.1.0"

docs/docs/guides/assets/multi-stage-delivery/promote.yaml

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+name: promote
+
+on:
+  workflow_dispatch:
+    inputs:
+      traceParent:
+        description: 'OTEL parent trace'
+        required: false
+        type: string
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  promote:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          # configure git client
+          git config --global user.email "<email address>"
+          git config --global user.name "<name>"
+
+          # create a new branch
+          git switch -c production/${{ github.sha }}
+
+          # promote the change
+          cp dev/values.yaml production/values.yaml
+
+          echo "traceParent: $TRACE_PARENT" >> production/values.yaml
+
+          # push the change to the new branch
+          git add production/values.yaml
+          git commit -m "Promote dev to production"
+          git push -u origin production/${{ github.sha }}
+        env:
+          TRACE_PARENT: ${{ inputs.traceParent }}
+      - run: |
+          gh pr create \
+            -B main \
+            -H production/${{ github.sha }} \
+            --title "Promote dev to production" \
+            --body "Automatically created by GHA"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

docs/docs/guides/assets/multi-stage-delivery/values-dev-updated.yaml

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+serviceVersion: v0.3.1
+commitID: "" # (1)!

docs/docs/guides/assets/multi-stage-delivery/values-dev.yaml

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+serviceVersion: v0.3.0
+commitID: "" # (1)!

docs/docs/guides/assets/multi-stage-delivery/values-production.yaml

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+serviceVersion: v0.3.0
+commitID: "" # (1)!
+traceParent: "" # (2)!