add bind resource request to improve availability during tests, also set memory limit = request following best practice

Signed-off-by: Tim Ramlot <42113979+inteon@users.noreply.github.com>

make/config/bind/configmap.yaml

@@ -10,6 +10,7 @@ data:
     	dnssec-validation auto;
     	auth-nxdomain no;    # conform to RFC1035
     	listen-on { any; };
+    	max-cache-size 192m;
     };
 
     zone "http01.example.com" {

make/config/bind/deployment.yaml

@@ -41,6 +41,12 @@ spec:
         volumeMounts:
         - mountPath: /config
           name: data
+        resources:
+          requests:
+            cpu: 10m
+            memory: 256Mi
+          limits:
+            memory: 256Mi
       volumes:
       - name: data
         configMap: