docs: add example files for day 2 operations docs PR (#2365)

Signed-off-by: Florian Bacher <florian.bacher@dynatrace.com>

docs/content/en/docs/implementing/day-2-operations/assets/app-updated-version.yaml

@@ -0,0 +1,16 @@
+apiVersion: lifecycle.keptn.sh/v1alpha3
+kind: KeptnApp
+metadata:
+  name: podtato-head
+  namespace: podtato-kubectl
+spec:
+  version: "0.1.0"
+  preDeploymentTasks:
+    - wait-for-prometheus
+  postDeploymentTasks:
+    - post-deployment-loadtests
+  workloads:
+    - name: podtato-head-frontend
+      version: 0.2.0 # Updated version. Needs to be set to the value of the 'app.kubernetes.io/version' label of the updated deployment
+    - name: podtato-head-hat
+      version: 1.1.1

docs/content/en/docs/implementing/day-2-operations/assets/app-with-new-workload.yaml

@@ -0,0 +1,18 @@
+apiVersion: lifecycle.keptn.sh/v1alpha3
+kind: KeptnApp
+metadata:
+  name: podtato-head
+  namespace: podtato-kubectl
+spec:
+  version: "0.1.0"
+  preDeploymentTasks:
+    - wait-for-prometheus
+  postDeploymentTasks:
+    - post-deployment-loadtests
+  workloads:
+    - name: podtato-head-frontend
+      version: 0.1.0
+    - name: podtato-head-hat
+      version: 1.1.1
+    - name: podtato-head-left-leg # The newly added workload
+      version: 0.1.0

docs/content/en/docs/implementing/day-2-operations/assets/deployment-initial.yaml

@@ -0,0 +1,44 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: podtato-kubectl
+  annotations:
+    keptn.sh/lifecycle-toolkit: "enabled"
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-frontend
+  namespace: podtato-kubectl
+spec:
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: podtato-head-frontend
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/version: 0.1.0
+        keptn.sh/pre-deployment-evaluations: my-evaluation
+        keptn.sh/pre-deployment-tasks: my-task
+    spec:
+      containers:
+        - name: podtato-head-frontend
+          image: podtato-head-frontend:a
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-hat
+  namespace: podtato-kubectl
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: podtato-head-hat
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/version: 0.1.1
+    spec:
+      containers:
+        - name: podtato-head-hat
+          image: podtato-head-hat:a

docs/content/en/docs/implementing/day-2-operations/assets/deployment-new-image-and-version.yaml

@@ -0,0 +1,18 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-frontend
+  namespace: podtato-kubectl
+spec:
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: podtato-head-frontend
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/version: 0.2.0 # The version label is now updated as well
+        keptn.sh/pre-deployment-evaluations: my-evaluation
+        keptn.sh/pre-deployment-tasks: my-task
+    spec:
+      containers:
+        - name: podtato-head-frontend
+          image: podtato-head-frontend:b # The image tag has been updated from 'a' to 'b'

docs/content/en/docs/implementing/day-2-operations/assets/deployment-new-image.yaml

@@ -0,0 +1,18 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-frontend
+  namespace: podtato-kubectl
+spec:
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: podtato-head-frontend
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/version: 0.1.0 # The version label stays the same and therefore no related KeptnWorkload will be affected
+        keptn.sh/pre-deployment-evaluations: my-evaluation
+        keptn.sh/pre-deployment-tasks: my-task
+    spec:
+      containers:
+        - name: podtato-head-frontend
+          image: podtato-head-frontend:b # Only the image tag has been updated from 'a' to 'b'

docs/content/en/docs/implementing/day-2-operations/assets/new-deployment.yaml

@@ -0,0 +1,16 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podtato-head-left-leg
+  namespace: podtato-kubectl
+spec:
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: podtato-head-left-leg
+        app.kubernetes.io/part-of: podtato-head
+        app.kubernetes.io/version: 0.1.0
+    spec:
+      containers:
+        - name: podtato-head-frontend
+          image: podtato-head-left-leg:a