Remove old manifests and replace with jsonnet build

examples/example-app/example-app.yaml

@@ -0,0 +1,36 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: example-app
+  labels:
+    tier: frontend
+  namespace: default
+spec:
+  selector:
+    app: example-app
+  ports:
+  - name: web
+    protocol: TCP
+    port: 8080
+    targetPort: web
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: example-app
+  namespace: default
+spec:
+  replicas: 4
+  template:
+    metadata:
+      labels:
+        app: example-app
+        version: 1.1.3
+    spec:
+      containers:
+      - name: example-app 
+        image: quay.io/fabxc/prometheus_demo_service
+        ports:
+        - name: web
+          containerPort: 8080
+          protocol: TCP