part2 is done (with volumes and a different index for each service)

p2/confs/app1.yaml

@@ -17,11 +17,22 @@ spec:
       containers:
       - name: app1
         image: nginx:1.14.2
+        volumeMounts:
+          - name: indexes 
+            mountPath: /usr/share/nginx/html/index.html
+            subPath: app1
+      volumes:
+        - name: indexes
+          configMap:
+            name: indexes
+            items:
+              - key: app1
+                path: app1
 ---
 apiVersion: v1
 kind: Service
 metadata:
-  name: app1
+  name: app1-service
 spec:
   type: NodePort
   selector:
@@ -29,4 +40,3 @@ spec:
   ports:
     - port: 80
       targetPort: 80
-      nodePort: 30080