Define minimum limits to run the ingress controller (#4843)

deploy/static/mandatory.yaml

@@ -276,3 +276,19 @@ spec:
                   - /wait-shutdown
 
 ---
+
+apiVersion: v1
+kind: LimitRange
+metadata:
+  name: ingress-nginx
+  namespace: ingress-nginx
+  labels:
+    app.kubernetes.io/name: ingress-nginx
+    app.kubernetes.io/part-of: ingress-nginx
+spec:
+  limits:
+  - default:
+    min:
+      memory: 90Mi
+      cpu: 100m
+    type: Container