GKE sslip.io DNS: 1 replica, no readiness

We only have 1 node (because I'm frugal), so we really need only one
replica (it's more likely that the node has crashed rather than my
fairly-simple server).

Also, I pushed out the liveness probe to 5 minutes so the logs aren't
cluttered with probes every ten seconds.

I got rid of the readiness probe, which is only for "[applications
[that] are temporarily unable to serve
traffic](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/)".
It cluttered the logs with its probes. Also my app is never
temporarily unable to serve.

fixes too many occurrences of:
```
::1.55268 TypeA 127.0.0.1.sslip.io. ? 127.0.0.1
```

k8s/sslip.io.yml

@@ -4,7 +4,7 @@ kind: Deployment
 metadata:
   name: sslip.io
 spec:
-  replicas: 2
+  replicas: 1
   selector:
     matchLabels:
       app: sslip.io-dns
@@ -30,14 +30,7 @@ spec:
             - "@localhost"
             - 127.0.0.1.sslip.io
             - +short
-          periodSeconds: 3600
+          periodSeconds: 300
-        readinessProbe:
-          exec:
-            command:
-            - dig
-            - "@localhost"
-            - 127.0.0.1.sslip.io
-            - +short
 ---
 apiVersion: v1
 kind: Service