Add Dashboard exercise files

Exercise_Starter_Files/sampleapp/k8s/jaeger-app-1.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-sample-app
+  labels:
+    name: my-sample-app
+  annotations:
+    "sidecar.jaegertracing.io/inject": "true"
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: my-sample-app
+  template:
+    metadata:
+      labels:
+        app: my-sample-app
+    spec:
+      containers:
+        - name: my-sample-app
+          image: ghcr.io/thejaysmith/my-sample-app:v1
+          imagePullPolicy: Always
+          ports:
+            - name: frontend
+              containerPort: 8888
+              protocol: TCP

Exercise_Starter_Files/sampleapp/k8s/jaeger-app-2.yaml

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+apiVersion: jaegertracing.io/v1
+kind: Jaeger
+metadata:
+  name: secondtest
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: second-sample-app
+  labels:
+    name: second-sample-app
+  annotations:
+    "sidecar.jaegertracing.io/inject": "true"
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: second-sample-app
+  template:
+    metadata:
+      labels:
+        app: second-sample-app
+    spec:
+      containers:
+        - name: second-sample-app
+          image: ghcr.io/thejaysmith/my-sample-app:v2
+          imagePullPolicy: Always
+          ports:
+            - name: backend-port
+              containerPort: 8000
+              protocol: TCP
+---
+apiVersion: v1
+kind: Service
+metadata:
+    name: backend
+spec:
+    selector:
+        app: second-sample-app
+    ports:
+        - protocol: TCP
+          port: 8000
+          targetPort: 8000

Exercise_Starter_Files/sampleapp/k8s/jaeger-instance.yaml

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+apiVersion: jaegertracing.io/v1
+kind: Jaeger
+metadata:
+  name: simpletest