Add init container to clean PostgreSQL data directory

cluster/apps/invidious/invidious-db.yml

@@ -14,6 +14,17 @@ spec:
       labels:
         app: invidious-db
     spec:
+      initContainers:
+      - name: clean-db-dir
+        image: busybox
+        command:
+        - sh
+        - -c
+        - |
+          rm -rf /var/lib/postgresql/data/lost+found
+        volumeMounts:
+        - name: postgres-data
+          mountPath: /var/lib/postgresql/data
       containers:
       - name: postgres
         image: postgres:14