fix: use ClusterIP + Endpoints instead of ExternalName for minio proxy

manifests/mastodon/svc-minio.yaml

@@ -4,7 +4,17 @@ metadata:
   name: minio-proxy
   namespace: mastodon
 spec:
-  type: ExternalName
-  externalName: minio.minio.svc.cluster.local
   ports:
     - port: 80
+      targetPort: 9000
+---
+apiVersion: v1
+kind: Endpoints
+metadata:
+  name: minio-proxy
+  namespace: mastodon
+subsets:
+  - addresses:
+      - ip: 10.96.209.83
+    ports:
+      - port: 9000