Remove old log stuff

modules/restserver/src/main/resources/reference.conf

@@ -25,11 +25,11 @@ docspell.server {
   logging {
     # The format for the log messages. Can be one of:
     # Json, Logfmt, Fancy or Plain
-    format = "Json"
+    format = "Plain"
 
     # The minimum level to log. From lowest to highest:
     # Trace, Debug, Info, Warn, Error
-    minimumLevel = "Debug"
+    minimum-level = "Info"
   }
 
   # Where the server binds to.