Add upload operation to task arguments

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

@@ -308,4 +308,28 @@ docspell.joex {
       working-dir = ${java.io.tmpdir}"/docspell-convert"
     }
   }
+
+  # The same section is also present in the rest-server config. It is
+  # used when submitting files into the job queue for processing.
+  #
+  # Currently, these settings may affect memory usage of all nodes, so
+  # it should be the same on all nodes.
+  files {
+    # Defines the chunk size (in bytes) used to store the files.
+    # This will affect the memory footprint when uploading and
+    # downloading files. At most this amount is loaded into RAM for
+    # down- and uploading.
+    #
+    # It also defines the chunk size used for the blobs inside the
+    # database.
+    chunk-size = 524288
+
+    # The file content types that are considered valid. Docspell
+    # will only pass these files to processing. The processing code
+    # itself has also checks for which files are supported and which
+    # not. This affects the uploading part and can be used to
+    # restrict file types that should be handed over to processing.
+    # By default all files are allowed.
+    valid-mime-types = [ ]
+  }
 }