support for ephemeral storage

values.yaml

@@ -576,6 +576,7 @@ affinity: {}
 # persistence is only required when config.DATABASE_DRIVER is sqlite3 or
 # undefined.
 persistence:
+  enabled: true
   annotation: {}
   # existingClaim:
   size: 5Gi
@@ -614,4 +615,4 @@ extraVolumeMounts: {}
 # - name: custom-ca-anchor
 #   mountPath: /usr/local/share/ca-certificates
 # - name: custom-tls-certificates
-#   mountPath: /etc/drone/tls
+#   mountPath: /etc/drone/tls