chore(goff): adjust config file injection

apps/goff/base/deployment.yaml

@@ -41,10 +41,8 @@ spec:
             - --config
             - /goff/config.yaml
           volumeMounts:
-            - name: config
-              mountPath: /goff/config.yaml
-            - name: default-flags
-              mountPath: /goff/default-flags.yaml
+            - name: configs
+              mountPath: /goff/
           ports:
             - name: http
               protocol: TCP
@@ -66,12 +64,9 @@ spec:
             periodSeconds: 10
             terminationGracePeriodSeconds: 1200
       volumes:
-        - name: config
+        - name: configs
           configMap:
-            name: goff-relay-config
-        - name: default-flags
-          configMap:
-            name: default-flags
+            name: goff-configs
 
 ---
 apiVersion: networking.k8s.io/v1

apps/goff/base/kustomization.yaml

@@ -3,9 +3,7 @@ kind: Kustomization
 resources:
   - deployment.yaml
 configMapGenerator:
-  - name: goff-relay-config
-    files:
-      - relay-config.yaml
-  - name: default-flags
+  - name: goff-configs
     files:
+      - config.yaml=relay-config.yaml
       - default-flags.yaml