feat(app/wizard): info panel telling to add env only once per swarm cluster (#11954)

app/react/portainer/environments/wizard/EnvironmentsCreationView/WizardDocker/WizardDocker.tsx

@@ -10,6 +10,7 @@ import EdgeAgentAsyncIcon from '@/react/edge/components/edge-agent-async.svg?c';
 
 import { BoxSelector, type BoxSelectorOption } from '@@/BoxSelector';
 import { BadgeIcon } from '@@/BadgeIcon';
+import { Alert } from '@@/Alert';
 
 import { AnalyticsStateKey } from '../types';
 import { EdgeAgentTab } from '../shared/EdgeAgentTab';
@@ -70,6 +71,17 @@ export function WizardDocker({ onCreate, isDockerStandalone }: Props) {
 
   return (
     <div className="form-horizontal">
+      {!isDockerStandalone && (
+        <Alert color="warn" className="col-sm-12 mb-2">
+          <div>
+            Only do this <b>once</b> for your environment, regardless of how
+            many nodes are in the cluster. You do <b>not</b> need to add each
+            node as an individual environment in Portainer. Adding just one node
+            (we recommend the manager node) will allow Portainer to manage the
+            entire cluster.
+          </div>
+        </Alert>
+      )}
       <BoxSelector
         onChange={(v) => setCreationType(v)}
         options={options}