add lumberjack log rotation (#5696)

* [logging] add UI and graphql for maximum log size
* [logger] set default size to 0MB and don't rotate

graphql/schema/types/config.graphql

@@ -155,6 +155,8 @@ input ConfigGeneralInput {
   logLevel: String
   "Whether to log http access"
   logAccess: Boolean
+  "Maximum log size"
+  logFileMaxSize: Int
   "True if galleries should be created from folders with images"
   createGalleriesFromFolders: Boolean
   "Regex used to identify images as gallery covers"
@@ -279,6 +281,8 @@ type ConfigGeneralResult {
   logLevel: String!
   "Whether to log http access"
   logAccess: Boolean!
+  "Maximum log size"
+  logFileMaxSize: Int!
   "Array of video file extensions"
   videoExtensions: [String!]!
   "Array of image file extensions"